diff --git a/FilterExtension/Core.cs b/FilterExtension/Core.cs
index 048d9c62..aac38bf7 100644
--- a/FilterExtension/Core.cs
+++ b/FilterExtension/Core.cs
@@ -118,11 +118,18 @@ private void getConfigs()
         private void getPartData()
         {
             List<string> modNames = new List<string>();
+            Editor.blackListedParts = new HashSet<string>();
 
             foreach (AvailablePart p in PartLoader.LoadedPartsList)
             {
                 if (p == null)
                     continue;
+                if (string.Equals(p.TechRequired, "Unresearchable", StringComparison.OrdinalIgnoreCase))
+                {
+                    Log(p.name);
+                    Editor.blackListedParts.Add(p.name);
+                    continue;
+                }
                 
                 if (string.IsNullOrEmpty(p.partUrl))
                     RepairAvailablePartUrl(p);
@@ -135,7 +142,9 @@ private void getPartData()
 
                     // associate the path to the part
                     if (!partPathDict.ContainsKey(p.name))
+                    {
                         partPathDict.Add(p.name, p.partUrl);
+                    }
                     else
                         Log(p.name + " duplicated part key in part path dictionary", LogLevel.Warn);
 
diff --git a/FilterExtension/Editor.cs b/FilterExtension/Editor.cs
index 19cad3cf..54e205dd 100644
--- a/FilterExtension/Editor.cs
+++ b/FilterExtension/Editor.cs
@@ -77,12 +77,6 @@ private IEnumerator editorInit()
             if (HighLogic.CurrentGame.Parameters.CustomParams<FESettings>().debug)
                 Core.Log("Starting on late categories", Core.LogLevel.Log);
 
-            // generate the set of parts to block
-            if (blackListedParts == null)
-            {
-                findPartsToBlock();
-            }
-
             // this is to be used for altering subcategories in a category added by another mod
             foreach (customCategory c in Core.Instance.Categories)
             {
@@ -176,43 +170,6 @@ public static void setSelectedCategory()
             }
         }
 
-        private void findPartsToBlock()
-        {
-            blackListedParts = new HashSet<string>();
-
-            // Only checking the category which should be Filter by Function (should I find FbF explicitly?)
-            PartCategorizer.Category mainCat = PartCategorizer.Instance.filters[0];
-
-            foreach (AvailablePart part in PartLoader.LoadedPartsList)
-            {
-                if (part.category == PartCategories.none && !checkPartVisible(part, mainCat))
-                {
-                    blackListedParts.Add(part.name);
-                }
-            }
-
-            // since this wasn't initialised until now, the already created categories may be completely empty
-            // culling them now
-            PartCategorizer.Category cat;
-            for (int i = PartCategorizer.Instance.categories.Count - 1; i >= 0; --i)
-            {
-                cat = PartCategorizer.Instance.categories[i];
-
-                for (int j = cat.subcategories.Count - 1; j >= 0; --j)
-                {
-                    Core.Log(cat.subcategories[j]);
-                    Core.Log(cat.subcategories[j].button.categoryName);
-                    //        if (checkIsEmptyCategory(cat.subcategories[j]))
-                    //        {
-                    //            cat.subcategories[j].DeleteSubcategory();
-                    //        }
-                }
-            //    if (cat.subcategories.Count > 0)
-            //        continue;
-            //    cat.DeleteCategory();
-            }
-        }
-
         private bool checkPartVisible(AvailablePart part, PartCategorizer.Category category)
         {
             for (int i = 0; i < category.subcategories.Count; ++i)
diff --git a/FilterExtension/Utility/PartType.cs b/FilterExtension/Utility/PartType.cs
index 5d4978dd..792c0efa 100644
--- a/FilterExtension/Utility/PartType.cs
+++ b/FilterExtension/Utility/PartType.cs
@@ -394,7 +394,9 @@ public static bool checkFolder(AvailablePart part, string[] value)
         {
             string path;
             if (Core.Instance.partPathDict.TryGetValue(part.name, out path))
+            {
                 return value.Contains(path.Substring(0, path.IndexOfAny(new char[] { '\\', '/' })));
+            }
             return false;
         }
 
diff --git a/GameData/000_FilterExtensions/FilterExtensions.dll b/GameData/000_FilterExtensions/FilterExtensions.dll
index 0fb34f21..f56f53ae 100644
Binary files a/GameData/000_FilterExtensions/FilterExtensions.dll and b/GameData/000_FilterExtensions/FilterExtensions.dll differ