The idea was that I could then play either version of the game with out disturbing the other.
however on windows (8.1 don't know about other versions) both versions of the game look to the same location
/Users/UserName/AppData/Roaming/factorio
it would be super nice if with each patch branch the /Roaming/factorio directory would be like this /Roaming/factorio(version)
So something like this factorio011x or factorio012x or factorio 0.11.x or factorio 0.12.x or however you want the naming convention to be.
This would allow your current games with what ever mods you have installed to not crash the latest and greatest or be crashed by the latest and greatest
![Smile :-)](./images/smilies/icon_e_smile.gif)