I accidentally sent btc to the default_wallet in electrum for which I don't know the password or seed . I've tried every password I use and nothing , I made this wallet a long time ago and never have used it but now it has btc in it that I need out . Any help please .
Same thing happened to me. I installed Electrum to poke around about a year ago and must have set up a wallet with a password.
Here I am a year later and I installed 2.0, opened it and didn't even think about the fact that I set up a wallet previously, and Electrum opened this old wallet. Transferred bitcoins to it and then got prompted for a password when I tried to transfer them out of it.
I have no idea what the password could be. I mean I tried all my personal usual suspects to no avail.
I completely own that it's on me but it might be helpful in future versions if you install a newer version of Electrum than the wallet "version" (confirmed that there are such things) some prompt comes up to warn you that you're using an older wallet instead of the application just starting up ready for use by opening the default wallet, if it exists. Or require the wallet password when opening the application.
I mean I get why it just opens the default wallet assuming that you have your shit together enough to know you had a previous wallet on your computer but it still seems like an frustrating disconnect to casual users.
Anyway, to answer your question, no, there's not much you can do but join me in the PEBKAC club.