http://docs.electrum.org/en/latest/faq.htmlThe default wallet file is called default_wallet which is created when you first run the application and located under the /wallets folder.
On Windows:
- Show hidden files
- Go to \Users\YourUserName\AppData\Roaming\Electrum\wallets (or %APPDATA%\Electrum\wallets)
On Mac:
- Open Finder
- Go to folder (shift+cmd+G) and type ~/.electrum
On Linux:
- Home Folder
- Go -> Location and type ~/.electrum
Thanks for help.
Problem resolved..
I use hidden folder and not default location.
Took a lot of time and I found this default_wallet.
Advice to members: Remember and save your location of wallet.dat