direct from electrum website - the windows installer.

and it deleted the wallet folder from the "Electrum" folder that was on my external drive (where elctrum was installed) and placed a new wallet folder in my OS drive and that new folder is empty while the old folder is simply just gone. System restore and windows previous versions are both incapable of replacing the folder - they see it but when the option to restore is selected the folder comes back but no wallet files. I have lost no funds just years and years of transactional data - I use electrum to put descriptions on each transaction.