diff --git a/FlowVision.xcodeproj/project.pbxproj b/FlowVision.xcodeproj/project.pbxproj
index 89cb2f5..c3afe1f 100644
--- a/FlowVision.xcodeproj/project.pbxproj
+++ b/FlowVision.xcodeproj/project.pbxproj
@@ -644,9 +644,10 @@
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				ASSETCATALOG_COMPILER_INCLUDE_ALL_APPICON_ASSETS = NO;
 				CODE_SIGN_ENTITLEMENTS = FlowVision/FlowVision.entitlements;
-				CODE_SIGN_STYLE = Automatic;
+				CODE_SIGN_STYLE = Manual;
 				COMBINE_HIDPI_IMAGES = YES;
 				CURRENT_PROJECT_VERSION = 20260111;
+				DEVELOPMENT_TEAM = "";
 				ENABLE_HARDENED_RUNTIME = YES;
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_FILE = FlowVision/Info.plist;
@@ -665,6 +666,7 @@
 				MERGED_BINARY_TYPE = automatic;
 				PRODUCT_BUNDLE_IDENTIFIER = netdcy.FlowVisionDbg;
 				PRODUCT_NAME = "$(TARGET_NAME)Dbg";
+				PROVISIONING_PROFILE_SPECIFIER = "";
 				SWIFT_EMIT_LOC_STRINGS = YES;
 				SWIFT_VERSION = 5.0;
 			};
@@ -677,10 +679,10 @@
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				ASSETCATALOG_COMPILER_INCLUDE_ALL_APPICON_ASSETS = NO;
 				CODE_SIGN_ENTITLEMENTS = FlowVision/FlowVision.entitlements;
-				CODE_SIGN_STYLE = Automatic;
+				CODE_SIGN_STYLE = Manual;
 				COMBINE_HIDPI_IMAGES = YES;
 				CURRENT_PROJECT_VERSION = 20260111;
-				DEVELOPMENT_TEAM = M9PR3WG2FN;
+				DEVELOPMENT_TEAM = "";
 				ENABLE_HARDENED_RUNTIME = YES;
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_FILE = FlowVision/Info.plist;
@@ -699,6 +701,7 @@
 				MERGED_BINARY_TYPE = automatic;
 				PRODUCT_BUNDLE_IDENTIFIER = netdcy.FlowVision;
 				PRODUCT_NAME = "$(TARGET_NAME)";
+				PROVISIONING_PROFILE_SPECIFIER = "";
 				SWIFT_EMIT_LOC_STRINGS = YES;
 				SWIFT_VERSION = 5.0;
 			};
diff --git a/FlowVision/Resources/Base.lproj/Main.storyboard b/FlowVision/Resources/Base.lproj/Main.storyboard
index fb1a4a0..384c3a0 100644
--- a/FlowVision/Resources/Base.lproj/Main.storyboard
+++ b/FlowVision/Resources/Base.lproj/Main.storyboard
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="23504" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
+<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="24506" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES">
     <dependencies>
         <deployment identifier="macosx"/>
-        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="23504"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="24506"/>
         <capability name="Named colors" minToolsVersion="9.0"/>
         <capability name="System colors introduced in macOS 10.14" minToolsVersion="10.0"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
@@ -1033,7 +1033,7 @@ Gw
                                                                                             <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                                                                                             <imageCell key="cell" refusesFirstResponder="YES" alignment="left" imageScaling="proportionallyDown" id="t2d-Ol-iJC"/>
                                                                                         </imageView>
-                                                                                        <textField focusRingType="none" horizontalHuggingPriority="251" verticalHuggingPriority="750" horizontalCompressionResistancePriority="250" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="0HQ-rx-KfT">
+                                                                                        <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" horizontalCompressionResistancePriority="250" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="0HQ-rx-KfT">
                                                                                             <rect key="frame" x="23" y="-24" width="234" height="24"/>
                                                                                             <autoresizingMask key="autoresizingMask" widthSizable="YES" flexibleMinY="YES"/>
                                                                                             <textFieldCell key="cell" lineBreakMode="truncatingTail" sendsActionOnEndEditing="YES" id="XDl-gN-nwq">
@@ -1170,24 +1170,24 @@ Gw
                                 <rect key="frame" x="20" y="20" width="760" height="522"/>
                                 <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                 <clipView key="contentView" drawsBackground="NO" id="A09-8j-haI">
-                                    <rect key="frame" x="0.0" y="0.0" width="745" height="522"/>
+                                    <rect key="frame" x="0.0" y="0.0" width="760" height="522"/>
                                     <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                     <subviews>
                                         <textView wantsLayer="YES" importsGraphics="NO" richText="NO" verticallyResizable="YES" findStyle="bar" spellingCorrection="YES" smartInsertDelete="YES" id="Hvc-43-Pyw">
-                                            <rect key="frame" x="0.0" y="0.0" width="745" height="522"/>
+                                            <rect key="frame" x="0.0" y="0.0" width="760" height="522"/>
                                             <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                             <color key="backgroundColor" name="textBackgroundColor" catalog="System" colorSpace="catalog"/>
-                                            <size key="minSize" width="745" height="522"/>
+                                            <size key="minSize" width="760" height="522"/>
                                             <size key="maxSize" width="760" height="10000000"/>
                                         </textView>
                                     </subviews>
                                 </clipView>
-                                <scroller key="horizontalScroller" hidden="YES" verticalHuggingPriority="750" horizontal="YES" id="2fu-s8-8On">
+                                <scroller key="horizontalScroller" hidden="YES" wantsLayer="YES" verticalHuggingPriority="750" horizontal="YES" id="2fu-s8-8On">
                                     <rect key="frame" x="-100" y="-100" width="225" height="15"/>
                                     <autoresizingMask key="autoresizingMask"/>
                                 </scroller>
-                                <scroller key="verticalScroller" verticalHuggingPriority="750" horizontal="NO" id="SXi-ew-SdF">
-                                    <rect key="frame" x="745" y="0.0" width="15" height="522"/>
+                                <scroller key="verticalScroller" wantsLayer="YES" verticalHuggingPriority="750" horizontal="NO" id="SXi-ew-SdF">
+                                    <rect key="frame" x="743" y="0.0" width="17" height="522"/>
                                     <autoresizingMask key="autoresizingMask"/>
                                 </scroller>
                             </scrollView>
diff --git a/FlowVision/Sources/Common/DataModel.swift b/FlowVision/Sources/Common/DataModel.swift
index 904afdc..d4f7410 100644
--- a/FlowVision/Sources/Common/DataModel.swift
+++ b/FlowVision/Sources/Common/DataModel.swift
@@ -736,6 +736,18 @@ class TreeViewModel {
             let oldChildren=node.children
             node.children=[]
             
+            // Add ".." entry to navigate up
+            if folderURL.path != "/" && folderURL.path != "root" {
+                let parentURL = folderURL.deletingLastPathComponent()
+                // Ensure we don't add ".." if the parent is the same as the current node
+                // (can happen with trailing slashes)
+                if parentURL.standardizedFileURL != folderURL.standardizedFileURL {
+                    let parentNode = TreeNode(name: "..", fullPath: parentURL.absoluteString)
+                    parentNode.hasChild = true // So it's always expandable
+                    node.children?.append(parentNode)
+                }
+            }
+            
             for subFolder in subFolders {
                 var name = subFolder.lastPathComponent
                 var fullPath = subFolder.absoluteString
diff --git a/FlowVision/Sources/ViewController.swift b/FlowVision/Sources/ViewController.swift
index 4fe9768..7816098 100644
--- a/FlowVision/Sources/ViewController.swift
+++ b/FlowVision/Sources/ViewController.swift
@@ -611,10 +611,22 @@ class ViewController: NSViewController, NSSplitViewDelegate, NSSearchFieldDelega
             largeImageView.imageView.preferredImageDynamicRange = (publicVar.isEnableHDR) ? .high : .standard
         }
         
-        mainScrollView.scrollerStyle = .legacy
-        outlineScrollView.scrollerStyle = .legacy
+        // Read the custom start directory from preferences, otherwise default to home directory
+        let userDefaults = UserDefaults.standard
+        var startPath = userDefaults.string(forKey: "startDirectoryPath")
+
+        if startPath == nil || startPath!.isEmpty {
+            startPath = NSHomeDirectory()
+        } else {
+            // Ensure the saved path is a valid directory
+            var isDir: ObjCBool = false
+            if !FileManager.default.fileExists(atPath: startPath!, isDirectory: &isDir) || !isDir.boolValue {
+                startPath = NSHomeDirectory() // Fallback to home if saved path is invalid
+            }
+        }
         
-        treeViewData.initData(path: treeRootFolder)
+        // Initialize the tree with the determined path
+        treeViewData.initData(path: startPath!)
         outlineView.reloadData()
         DispatchQueue.main.async {
             self.outlineViewManager.adjustColumnWidth()
@@ -986,22 +998,44 @@ class ViewController: NSViewController, NSSplitViewDelegate, NSSearchFieldDelega
     }
     
     @objc func outlineViewDoubleClicked(_ sender: AnyObject) {
-        // 获取当前选中的行
         let row = outlineView.clickedRow
+        guard row != -1, let item = outlineView.item(atRow: row) as? TreeNode else {
+            return
+        }
 
-        // 确保点击的是有效行
-        if row == -1 {
+        guard let url = URL(string: item.fullPath) else { return }
+        
+        // Handle special cases like virtual tags
+        if url.scheme != "file" {
+            // This is not a filesystem path, just do the default selection action
+            outlineViewManager.itemSelected(item)
             return
         }
+        
+        let path = url.path
+        
+        var isDir: ObjCBool = false
+        if FileManager.default.fileExists(atPath: path, isDirectory: &isDir), isDir.boolValue {
+            changeTreeRoot(to: path)
+        }
+    }
 
-        // 获取行对应的条目
-        if let item = outlineView.item(atRow: row) {
-            if outlineView.isItemExpanded(item) {
-                outlineView.collapseItem(item)
-            } else {
-                outlineView.expandItem(item)
-            }
+    func changeTreeRoot(to newRootPath: String) {
+        // Persist the new root path
+        UserDefaults.standard.set(newRootPath, forKey: "startDirectoryPath")
+
+        // Re-initialize the tree data model with the new path
+        treeViewData.initData(path: newRootPath)
+        outlineView.reloadData()
+        
+        // Use a dispatch queue to allow the reload to complete before adjusting width
+        DispatchQueue.main.async {
+            self.outlineViewManager.adjustColumnWidth()
         }
+
+        // Also switch the main view to this new root directory
+        let destUrl = URL(fileURLWithPath: newRootPath).absoluteString
+        switchDirByDirection(direction: .zero, dest: destUrl, doCollapse: false, expandLast: false, skip: false, stackDeep: 0)
     }
     
     override func viewDidLayout() {