On Windows the file path should be:
C:\Users\*USERNAME*\AppData\LocalLow\Impy\Sweeper
Replace *USERNAME* with your account name. It won't be the C drive if your operating system is installed somewhere else.
what do we do if we want to unlock the endings on a MAC?
I have not used Macs in a while, but I think that the file path is likely to look a bit like this:
~/Library/Application Support/Impy/Sweeper/