Well the best way would be to re-install the program on the different drive instead of moving it. When you move any program instead of do a re-install the registry is not updated and there for it sees the program as missing. It is never a good idea to just move any program. The best way is to uninstall it and then do a install to the new location.
Thanks for your reply. But the version I have doesn't require installation of the program. I downloaded it as zip file. I just unzipped it and it works like the normal one.