--- D:\Install\meld_1.7\meld_original\meld\preferences.py
+++ D:\Install\meld_1.7\meld\meld\preferences.py
@@ -368,7 +368,7 @@
 
     def get_editor_command(self, files):
         if self.edit_command_type == "custom":
-            return self.edit_command_custom.split() + files
+            return [self.edit_command_custom] + files
         else:
             if not hasattr(self, "_gconf"):
                 return []