First pass. Go easy on me.

Perpetuum.DataDumper/App.config

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+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+    <configSections>
+        <sectionGroup name="userSettings" type="System.Configuration.UserSettingsGroup, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" >
+            <section name="Perpetuum.DataDumper.Properties.Settings" type="System.Configuration.ClientSettingsSection, System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" allowExeDefinition="MachineToLocalUser" requirePermission="false" />
+        </sectionGroup>
+    </configSections>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1"/>
+    </startup>
+    <userSettings>
+        <Perpetuum.DataDumper.Properties.Settings>
+            <setting name="ServerPath" serializeAs="String">
+                <value>C:\PerpetuumServer\data</value>
+            </setting>
+            <setting name="DictionaryPath" serializeAs="String">
+                <value>C:\PerpetuumServer\data\dictionary.txt</value>
+            </setting>
+        </Perpetuum.DataDumper.Properties.Settings>
+    </userSettings>
+</configuration>

Perpetuum.DataDumper/Base Views/ActiveModuleDataView.cs

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+namespace Perpetuum.DataDumper {
+    public partial class DataDumper
+    {
+        public class ActiveModuleDataView : ModuleDataView {
+            // These are nullable because some items may be
+            // in a group of active modules but are themselves
+            // passive and we don't want to show 0 for them
+            public double? ModuleAccumulator { get; set; }
+            public double? ModuleCycle { get; set; }
+            public double? ModuleOptimalRange { get; set; }
+        }
+
+    }
+}

Perpetuum.DataDumper/Base Views/EntityDataView.cs

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+using System.Collections.Generic;
+
+namespace Perpetuum.DataDumper {
+    public class EntityDataView {
+        public string ItemName { get; set; } // This should actually be renamed...
+        public string ItemKey { get; set; }
+        public List<string> ItemCategories { get; set; }
+    }
+}

Perpetuum.DataDumper/Base Views/ItemDataView.cs

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+namespace Perpetuum.DataDumper {
+    public partial class DataDumper
+    {
+        public class ItemDataView : EntityDataView {
+            public double ItemMass { get; set; }
+            public double ItemVolume { get; set; }
+            public double ItemVolumePacked { get; set; }
+
+        }
+
+    }
+}

Perpetuum.DataDumper/Base Views/ModuleDataView.cs

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+using System.Collections.Generic;
+
+namespace Perpetuum.DataDumper {
+    public partial class DataDumper
+    {
+        public class ModuleDataView : ItemDataView {
+            public string ModuleTier { get; set; }
+            public double ModuleCpu { get; set; }
+            public double ModuleReactor { get; set; }
+            public List<string> ExtensionsRequired { get; set; }
+        }
+
+    }
+}