Reverting to older Cabbage(Lite) versions doesn't overwrite executable on OSX

I have not tested this extensively, but in OSX when I revert to older versions of cabbage, it does not overwrite the CabbageLite executable.

I end up performing a `$ sudo rm -rf /Applications/Cabbage*`

I did not test if the main cabbage executable overwrites (yet).  I also haven't tested other operating systems (yet), but could possibly test in windows if needed.