No, this is the first time I’ve installed it. I was syncing the wallet for a few days… maybe it had something to do with my power going out while I was syncing the wallet
You’ve obviously tried redownloading the exe in case it got currupted?
Otherwise the blockchain may have got corrupted? you could try renaming the feathercoin directory (after backing up copying the wallet.dat). Then see if the software will start and re-download the blockchain.