diff --git a/Dockerfile b/Dockerfile.build
similarity index 100%
rename from Dockerfile
rename to Dockerfile.build
diff --git a/Dockerfile.dev b/Dockerfile.dev
new file mode 100644
index 00000000..00c51086
--- /dev/null
+++ b/Dockerfile.dev
@@ -0,0 +1,21 @@
+FROM --platform=amd64 debian:11.6-slim@sha256:f7d141c1ec6af549958a7a2543365a7829c2cdc4476308ec2e182f8a7c59b519
+
+LABEL description="Development environment for bemanitools"
+
+# mingw-w64-gcc has 32-bit and 64-bit toolchains
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    mingw-w64 \
+    mingw-w64-common \
+    make \
+    zip \
+    git \
+    clang-format \
+    python3-pip \
+ && rm -rf /var/lib/apt/lists/*
+
+RUN pip3 install mdformat
+
+RUN mkdir /bemanitools
+WORKDIR /bemanitools
+
+ENV SHELL /bin/bash
\ No newline at end of file
diff --git a/GNUmakefile b/GNUmakefile
index 83289629..9aef0b1b 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -13,8 +13,10 @@ BUILDDIR        ?= build
 
 builddir_docker 	  := $(BUILDDIR)/docker
 
-docker_container_name := "bemanitools-build"
-docker_image_name     := "bemanitools-build:latest"
+docker_build_container_name := "bemanitools-build"
+docker_build_image_name     := "bemanitools-build:latest"
+docker_dev_container_name := "bemanitools-dev"
+docker_dev_image_name     := "bemanitools-dev:latest"
 
 depdir                := $(BUILDDIR)/dep
 objdir                := $(BUILDDIR)/obj
@@ -41,6 +43,7 @@ FORCE:
 
 .PHONY: \
 build-docker \
+dev-docker \
 clean \
 code-format \
 doc-format \
@@ -89,21 +92,38 @@ version:
 	$(V)echo "$(gitrev)" > version
 
 build-docker:
-	$(V)docker rm -f $(docker_container_name) 2> /dev/null || true
+	$(V)docker rm -f $(docker_build_container_name) 2> /dev/null || true
 	$(V)docker \
 		build \
-		-t $(docker_image_name) \
-		-f Dockerfile \
+		-t $(docker_build_image_name) \
+		-f Dockerfile.build \
 		.
 	$(V)docker \
 		run \
 		--volume $(shell pwd):/bemanitools \
-		--name $(docker_container_name) \
-		$(docker_image_name)
+		--name $(docker_build_container_name) \
+		$(docker_build_image_name)
+
+dev-docker:
+	$(V)docker rm -f $(docker_dev_container_name) 2> /dev/null || true
+	$(V)docker \
+		build \
+		-t $(docker_dev_image_name) \
+		-f Dockerfile.dev \
+		.
+	$(V)docker \
+		run \
+		--interactive \
+		--tty \
+		--volume $(shell pwd):/bemanitools \
+		--name $(docker_dev_container_name) \
+		$(docker_dev_image_name)
 
 clean-docker:
-	$(V)docker rm -f $(docker_container_name) || true
-	$(V)docker image rm -f $(docker_image_name) || true
+	$(V)docker rm -f $(docker_dev_container_name) || true
+	$(V)docker image rm -f $(docker_dev_image_name) || true
+	$(V)docker rm -f $(docker_build_container_name) || true
+	$(V)docker image rm -f $(docker_build_image_name) || true
 	$(V)rm -rf $(BUILDDIR)
 
 #
diff --git a/Module.mk b/Module.mk
index 2a948a8d..35e690dd 100644
--- a/Module.mk
+++ b/Module.mk
@@ -710,6 +710,8 @@ $(zipdir)/ddr-14-to-18.zip: \
 		build/bin/indep-32/eamio.dll \
 		build/bin/indep-32/geninput.dll \
 		dist/ddr/config.bat \
+		dist/ddr/gamestart-17.bat \
+		dist/ddr/gamestart-18.bat \
 		dist/ddr/gamestart-14.bat \
 		dist/ddr/gamestart-15.bat \
 		dist/ddr/gamestart-16.bat \
@@ -728,6 +730,8 @@ $(zipdir)/ddr-16-to-18-x64.zip: \
 		build/bin/indep-64/eamio.dll \
 		build/bin/indep-64/geninput.dll \
 		dist/ddr/config.bat \
+		dist/ddr/gamestart-17.bat \
+		dist/ddr/gamestart-18.bat \
 		dist/ddr/gamestart-16.bat \
 		dist/ddr/gamestart-17.bat \
 		dist/ddr/gamestart-18.bat \
diff --git a/src/imports/avs.h b/src/imports/avs.h
index a2d439ec..9dce5beb 100644
--- a/src/imports/avs.h
+++ b/src/imports/avs.h
@@ -220,6 +220,9 @@ void property_file_write(struct property *prop, const char *path);
 int property_set_flag(struct property *prop, int flags, int mask);
 void property_destroy(struct property *prop);
 
+avs_error property_get_error(struct property *prop);
+struct property *property_clear_error(struct property *prop);
+
 int property_psmap_import(
     struct property *prop,
     struct property_node *root,
diff --git a/src/imports/import_32_0_avs.def b/src/imports/import_32_0_avs.def
index 273e5be8..9632ecb4 100644
--- a/src/imports/import_32_0_avs.def
+++ b/src/imports/import_32_0_avs.def
@@ -25,6 +25,8 @@ EXPORTS
     property_destroy
     property_file_write
     property_insert_read
+    property_clear_error
+    property_get_error
     property_mem_write
     property_read_query_memsize
     property_search
diff --git a/src/imports/import_32_1002_avs.def b/src/imports/import_32_1002_avs.def
index e2ff5ae5..cc4ee29c 100644
--- a/src/imports/import_32_1002_avs.def
+++ b/src/imports/import_32_1002_avs.def
@@ -28,6 +28,8 @@ EXPORTS
     property_destroy
     property_file_write
     property_insert_read
+    property_clear_error
+    property_get_error
     property_mem_write
     property_read_query_memsize
     property_search
diff --git a/src/imports/import_32_1101_avs.def b/src/imports/import_32_1101_avs.def
index 10c59e4f..776dc712 100644
--- a/src/imports/import_32_1101_avs.def
+++ b/src/imports/import_32_1101_avs.def
@@ -26,6 +26,8 @@ EXPORTS
     property_desc_to_buffer @246 NONAME
     property_destroy @247 NONAME
     property_insert_read @255 NONAME
+    property_clear_error @573 NONAME
+    property_get_error @573 NONAME
     property_node_create @266 NONAME
     property_node_datasize @267 NONAME
     property_node_name @274 NONAME
diff --git a/src/imports/import_32_1304_avs.def b/src/imports/import_32_1304_avs.def
index f83d5a5f..18dad23a 100644
--- a/src/imports/import_32_1304_avs.def
+++ b/src/imports/import_32_1304_avs.def
@@ -25,6 +25,8 @@ EXPORTS
     property_desc_to_buffer @201 NONAME
     property_destroy @264 NONAME
     property_insert_read @23 NONAME
+    property_clear_error @573 NONAME
+    property_get_error @573 NONAME
     property_node_create @316 NONAME
     property_node_datasize @249 NONAME
     property_node_name @255 NONAME
diff --git a/src/imports/import_32_1306_avs.def b/src/imports/import_32_1306_avs.def
index f963ec88..f6deed72 100644
--- a/src/imports/import_32_1306_avs.def
+++ b/src/imports/import_32_1306_avs.def
@@ -25,6 +25,8 @@ EXPORTS
     property_desc_to_buffer @201 NONAME == XC058ba50000cd
     property_destroy @264 NONAME == XC058ba500010f
     property_insert_read @23 NONAME == XC058ba5000016
+    property_clear_error @573 NONAME
+    property_get_error @573 NONAME
     property_node_create @316 NONAME == XC058ba5000143
     property_node_datasize @249 NONAME == XC058ba5000100
     property_node_name @255 NONAME == XC058ba5000106
diff --git a/src/imports/import_32_1403_avs.def b/src/imports/import_32_1403_avs.def
index de171c12..716d0817 100644
--- a/src/imports/import_32_1403_avs.def
+++ b/src/imports/import_32_1403_avs.def
@@ -24,6 +24,8 @@ EXPORTS
     property_desc_to_buffer @131 NONAME
     property_destroy @130 NONAME
     property_insert_read @133 NONAME
+    property_clear_error @573 NONAME
+    property_get_error @573 NONAME
     property_node_name @573 NONAME == 
     property_node_read @573 NONAME == 
     property_node_remove @148 NONAME
diff --git a/src/imports/import_32_1508_avs.def b/src/imports/import_32_1508_avs.def
index d1625126..504a303f 100644
--- a/src/imports/import_32_1508_avs.def
+++ b/src/imports/import_32_1508_avs.def
@@ -26,6 +26,8 @@ EXPORTS
     property_desc_to_buffer @129 NONAME
     property_destroy @128 NONAME
     property_insert_read @131 NONAME
+    property_clear_error @573 NONAME
+    property_get_error @573 NONAME
     property_node_create @145 NONAME
     property_node_name @150 NONAME
     property_node_read @154 NONAME == XCd229cc0000f3
diff --git a/src/imports/import_32_1601_avs.def b/src/imports/import_32_1601_avs.def
index 74332d48..286806bf 100644
--- a/src/imports/import_32_1601_avs.def
+++ b/src/imports/import_32_1601_avs.def
@@ -19,6 +19,8 @@ EXPORTS
     property_destroy @125 NONAME
     property_desc_to_buffer @126 NONAME
     property_insert_read @128 NONAME
+    property_clear_error @573 NONAME
+    property_get_error @573 NONAME
     property_search @141 NONAME
     property_node_create @142 NONAME
     property_node_name @147 NONAME == XCnbrep7000092
diff --git a/src/imports/import_32_1603_avs.def b/src/imports/import_32_1603_avs.def
index 21f55c1e..93fd07d2 100644
--- a/src/imports/import_32_1603_avs.def
+++ b/src/imports/import_32_1603_avs.def
@@ -19,6 +19,8 @@ EXPORTS
     property_destroy @146 NONAME
     property_desc_to_buffer @147 NONAME
     property_insert_read @149 NONAME
+    property_clear_error @158 NONAME == XCnbrep700009d
+    property_get_error @159 NONAME == XCnbrep700009e
     property_search @162 NONAME
     property_node_create @163 NONAME
     property_node_name @168 NONAME == XCnbrep70000a7
diff --git a/src/imports/import_32_1700_avs.def b/src/imports/import_32_1700_avs.def
index 7dc4eaa8..f01bc391 100644
--- a/src/imports/import_32_1700_avs.def
+++ b/src/imports/import_32_1700_avs.def
@@ -21,6 +21,8 @@ EXPORTS
     property_destroy @146 NONAME
     property_desc_to_buffer @147 NONAME
     property_insert_read @149 NONAME
+    property_clear_error @158 NONAME == XCgsqzn000009d
+    property_get_error @159 NONAME == XCgsqzn000009e
     property_search @162 NONAME
     property_node_create @163 NONAME
     property_node_name @168 NONAME == XCgsqzn00000a7
diff --git a/src/imports/import_32_803_avs.def b/src/imports/import_32_803_avs.def
index 37f2b3e6..9340dad5 100644
--- a/src/imports/import_32_803_avs.def
+++ b/src/imports/import_32_803_avs.def
@@ -25,6 +25,8 @@ EXPORTS
     property_destroy
     property_file_write
     property_insert_read
+    property_clear_error
+    property_get_error
     property_mem_write
     property_read_query_memsize
     property_search
diff --git a/src/imports/import_64_1508_avs.def b/src/imports/import_64_1508_avs.def
index 6aeaba1d..1a93e7e5 100644
--- a/src/imports/import_64_1508_avs.def
+++ b/src/imports/import_64_1508_avs.def
@@ -26,6 +26,8 @@ EXPORTS
     property_desc_to_buffer @129 NONAME
     property_destroy @128 NONAME
     property_insert_read @131 NONAME
+    property_clear_error @573 NONAME
+    property_get_error @573 NONAME
     property_node_create @145 NONAME
     property_node_name @150 NONAME
     property_node_read @154 NONAME == XCd229cc0000f3
diff --git a/src/imports/import_64_1509_avs.def b/src/imports/import_64_1509_avs.def
index fde35d65..a596513a 100644
--- a/src/imports/import_64_1509_avs.def
+++ b/src/imports/import_64_1509_avs.def
@@ -26,6 +26,8 @@ EXPORTS
     property_desc_to_buffer @129 NONAME
     property_destroy @128 NONAME
     property_insert_read @131 NONAME
+    property_clear_error @573 NONAME
+    property_get_error @573 NONAME
     property_node_create @145 NONAME
     property_node_name @573 NONAME == 
     property_node_read @573 NONAME == 
diff --git a/src/imports/import_64_1601_avs.def b/src/imports/import_64_1601_avs.def
index 418395f7..960fb947 100644
--- a/src/imports/import_64_1601_avs.def
+++ b/src/imports/import_64_1601_avs.def
@@ -19,6 +19,8 @@ EXPORTS
     property_destroy @125 NONAME
     property_desc_to_buffer @126 NONAME
     property_insert_read @128 NONAME
+    property_clear_error @573 NONAME
+    property_get_error @573 NONAME
     property_search @141 NONAME
     property_node_create @142 NONAME
     property_node_name @147 NONAME == XCnbrep7000092
diff --git a/src/imports/import_64_1603_avs.def b/src/imports/import_64_1603_avs.def
index b106ab1b..14f42b7b 100644
--- a/src/imports/import_64_1603_avs.def
+++ b/src/imports/import_64_1603_avs.def
@@ -19,12 +19,14 @@ EXPORTS
     property_destroy @146 NONAME
     property_desc_to_buffer @147 NONAME
     property_insert_read @149 NONAME
+    property_clear_error @158 NONAME == XCnbrep700009d
+    property_get_error @159 NONAME == XCnbrep700009e
     property_search @162 NONAME
     property_node_create @163 NONAME
     property_node_name @168 NONAME == XCnbrep70000a7
     property_node_remove @164 NONAME
     property_node_type @169 NONAME == XCnbrep70000a8
-    property_node_clone @165 NONAME
+    property_node_clone @165 NONAME == XCnbrep70000a4
     property_node_traversal @167 NONAME
     property_node_refdata @166 NONAME == XCnbrep70000a5
     property_node_datasize @171 NONAME == XCnbrep70000aa
diff --git a/src/imports/import_64_1700_avs.def b/src/imports/import_64_1700_avs.def
index 8cddba8a..3e456b50 100644
--- a/src/imports/import_64_1700_avs.def
+++ b/src/imports/import_64_1700_avs.def
@@ -21,6 +21,8 @@ EXPORTS
     property_destroy @146 NONAME
     property_desc_to_buffer @147 NONAME
     property_insert_read @149 NONAME
+    property_clear_error @158 NONAME == XCgsqzn000009d
+    property_get_error @159 NONAME == XCgsqzn000009e
     property_search @162 NONAME
     property_node_create @163 NONAME
     property_node_name @168 NONAME == XCgsqzn00000a7
diff --git a/src/main/hook/table.c b/src/main/hook/table.c
index ed67b3b6..067ea75f 100644
--- a/src/main/hook/table.c
+++ b/src/main/hook/table.c
@@ -15,12 +15,21 @@ static const size_t apiset_prefix_len = sizeof(apiset_prefix) - 1;
 static void hook_table_apply_to_all(
     const char *depname, const struct hook_symbol *syms, size_t nsyms);
 
+static void hook_table_revert_to_all(
+    const char *depname, const struct hook_symbol *syms, size_t nsyms);
+
 static void hook_table_apply_to_iid(
     HMODULE target,
     const pe_iid_t *iid,
     const struct hook_symbol *syms,
     size_t nsyms);
 
+static void hook_table_revert_to_iid(
+    HMODULE target,
+    const pe_iid_t *iid,
+    const struct hook_symbol *syms,
+    size_t nsyms);
+
 static bool hook_table_match_module(
     HMODULE target, const char *iid_name, const char *depname);
 
@@ -44,6 +53,23 @@ static void hook_table_apply_to_all(
     }
 }
 
+static void hook_table_revert_to_all(
+    const char *depname, const struct hook_symbol *syms, size_t nsyms)
+{
+    const peb_dll_t *dll;
+    HMODULE pe;
+
+    for (dll = peb_dll_get_first(); dll != NULL; dll = peb_dll_get_next(dll)) {
+        pe = peb_dll_get_base(dll);
+
+        if (pe == NULL) {
+            continue; /* ?? Happens sometimes. */
+        }
+
+        hook_table_revert(pe, depname, syms, nsyms);
+    }
+}
+
 void hook_table_apply(
     HMODULE target,
     const char *depname,
@@ -73,6 +99,35 @@ void hook_table_apply(
     }
 }
 
+void hook_table_revert(
+    HMODULE target,
+    const char *depname,
+    const struct hook_symbol *syms,
+    size_t nsyms)
+{
+    const pe_iid_t *iid;
+    const char *iid_name;
+
+    assert(depname != NULL);
+    assert(syms != NULL || nsyms == 0);
+
+    if (target == NULL) {
+        /*  Call out, which will then call us back repeatedly. Awkward, but
+            viewed from the outside it's good for usability. */
+
+        hook_table_revert_to_all(depname, syms, nsyms);
+    } else {
+        for (iid = pe_iid_get_first(target); iid != NULL;
+             iid = pe_iid_get_next(target, iid)) {
+            iid_name = pe_iid_get_name(target, iid);
+
+            if (hook_table_match_module(target, iid_name, depname)) {
+                hook_table_revert_to_iid(target, iid, syms, nsyms);
+            }
+        }
+    }
+}
+
 static void hook_table_apply_to_iid(
     HMODULE target,
     const pe_iid_t *iid,
@@ -101,6 +156,33 @@ static void hook_table_apply_to_iid(
     }
 }
 
+static void hook_table_revert_to_iid(
+    HMODULE target,
+    const pe_iid_t *iid,
+    const struct hook_symbol *syms,
+    size_t nsyms)
+{
+    struct pe_iat_entry iate;
+    size_t i;
+    size_t j;
+    const struct hook_symbol *sym;
+
+    i = 0;
+
+    while (pe_iid_get_iat_entry(target, iid, i++, &iate) == S_OK) {
+        for (j = 0; j < nsyms; j++) {
+            sym = &syms[j];
+
+            if (hook_table_match_proc(&iate, sym)) {
+                // Only revert-able if the original pointer was stored previously
+                if (sym->link != NULL && *sym->link != NULL) {
+                    pe_patch(iate.ppointer, sym->link, sizeof(*sym->link));
+                } 
+            }
+        }
+    }
+}
+
 static bool hook_table_match_module(
     HMODULE target, const char *iid_name, const char *depname)
 {