I have an 8Kb "default_wallet" file in the folder but no, I don't have the seed for electrum.
If you open that wallet does it show the correct balance and addresses?
If so its the correct file. If you have no seed, do you have a relativly good idea about the password? Relativly good here means that if you can reduce it to a few billion passwords you would need to try to find the correct one, there is a high chance that you can either brute force the wallet yourself[1], ask here (e.g. me) for help or hire Dave who for all I know does it for a living[2].
[1] https://github.com/gurnec/btcrecover
[2] http://www.walletrecoveryservices.com/