Navigate to: "HKEY_CLASSES_ROOT \exefile\shell\open\command"
Double-click the (Default) value in the right hand pane and delete the current value data, and then type: "%1" %* (Type this EXACTLY as shown including the quotes and asterisk)
Navigate to: HKEY_CLASSES_ROOT\.exe
In the right-hand pane, set (default) to exefile
Exit the Registry Editor.