Browse to the LGC file location "C:\Users\YOUR_USERNAME\AppData\Roaming\LogiCoin" and only if you have not sent any LGC to the wallet delete the logicoin folder and run the logicoin-QT.exe from the OP, if you have sent coins to the lgc wallet back up your wallet.dat file and paste it back into the LogiCoin folder after you have deleted the old LogiCoin folder and ran logicoin-QT.exe and turned it off.