I've tried installing inventor 2012 many times but the actual program never seems to actually install. It goes through the entire installing process without a problem but afterwards the there's never anything there where it said it was installing it to. Could it be that I already have 2011 installed? Do i need to uninstall that first? Also in the installer it has a checkmark next to Audodesk inventor 2012 and says "installed". I've tried redownloading it and everything.