Ok, thought that would fix it...my mistake. I forget which one of the two solutions it is, so on to the next one in my bag of tricks.
Ok, in the project folder (of the game that won't open) there should two files titled Game. Open the one that is an a type "application settings" (the icon should probably have a gear in the middle of it, or something like that). The file will open up a notepad file. Now, the file, three lines down will probably say something like:
Now replace that line with this:
And if that doesn't fix it,
I don't know what will
. This ought to do it though.
EDIT: actually, I may have a third possibility...but lets see if this will fix it first.