-snip- I use the windows portable executable, windows 10 now, might have been win7 four years ago or initially.
Portable? So the data directory will be the same directory as your Electrum-portable.exe.
Was your original wallet non-portable like "stand-alone"?Because if it is, your real wallet might be in your user-roaming folders: Hit "
WindowsKey+R", type
%appdata% then enter.
Open 'Electrum', then 'wallets'; if there are files there, then that should be your original wallet file (
make a backup copy).
Use a non-portable version to open it or browse to that location when selecting wallets using "
File->Open" in Electrum.