You mean you copy-pasted in another folder ? It is possible it doesn't work because of registry keys, either reinstall or try to adjust registry keys, just search for Evergate, I think there are 2 keys in registry which you need to adjust...
EDIT: Nope, it has nothing with registry keys, game should run from any folder as I can see
EDIT2: Do you have anything here "C:\Users\Your user name\AppData\LocalLow\StoneLantern\Evergate" ?