system_demo_mode: correct hidden file skipping

system_demo_mode/config.py

@@ -23,11 +23,8 @@ import os
 
 def blend_list(path):
     for dirpath, dirnames, filenames in os.walk(path):
-
-        # skip '.svn'
-        if dirpath.startswith("."):
-            continue
-
+        # skip '.git'
+        dirnames[:] = [d for d in dirnames if not d.startswith(".")]
         for filename in filenames:
             if filename.lower().endswith(".blend"):
                 filepath = os.path.join(dirpath, filename)