HeyaSaASSADAS DASDASDASDSA
What version are you using?
I’m surprised to hear that deleting the wallets didn’t at least get you up and running with an empty client. Worst case you can reinstall the program and re-download the blockchain.
Once you have a client up and running with an updated blockchain, try importing each wallet directly from the GUI as an NSR wallet, then an NBT wallet. See if either can import as either type.
You should try to load the wallets with the version of Nu that you remember was loading the wallets.
I ran into an issue in the past where the new version of Nu as failing to load my wallets!