I imagine someone has answered this already but i cant find it. i found a file from 2013, which is my only backup i have of some small amount of bitcoins ...bitcoin-wallet-keys and date. it seems it is encrypted...long string of characters starting with U. i downloaded a wallet to try and import it but i can't remember the password. i tried everything i could think of and got message that it couldn't decrypt, check password.

is there any way to retrieve the bitcoins? thx!