diff --git a/plugins/DupFileManager/DupFileManager_config_dev.py b/plugins/DupFileManager/DupFileManager_config_dev.py
deleted file mode 100644
index e4829bed..00000000
--- a/plugins/DupFileManager/DupFileManager_config_dev.py
+++ /dev/null
@@ -1,24 +0,0 @@
-# Below fields are in the development stage, and should not be used.
-config_dev = {
-    # If enabled, ignore reparsepoints. For Windows NT drives only.
-    "ignoreReparsepoints" : True,
-    # If enabled, ignore symbolic links.
-    "ignoreSymbolicLinks" : True,
-    
-    # If enabled, swap longer file name to preferred path.
-    "swapLongFileName" : False,
-    
-    # If enabled, when finding exact duplicate files, keep file with the shorter name. The default is to keep file name with the longer name.
-    "keepShorterFileName" : False,
-    # If enabled, when finding duplicate files, keep media with the shorter time length. The default is to keep media with longer time length.
-    "keepShorterLength" : False,
-    # If enabled, when finding duplicate files, keep media with the lower resolution. The default is to keep media with higher resolution.
-    "keepLowerResolution" : False,
-    # If enabled, keep duplicate media with high resolution over media with significant longer time.
-    "keepHighResOverLen" : False, # Requires keepBothHighResAndLongerLen = False
-    # If enabled, keep both duplicate files if the LOWER resolution file is significantly longer.
-    "keepBothHighResAndLongerLen" : True,
-    
-    # Keep empty to check all paths, or populate it with the only paths to check for duplicates
-    "onlyCheck_paths": [],     #Example: "onlyCheck_paths": ['C:\\SomeMediaPath\\subpath', "E:\\YetAnotherPath\\subpath', "E:\\YetAnotherPath\\secondSubPath']
-}