Is there some kind of Wallet Backup / Seed generation?
How can I save/recreate my wallet in case of an data loss?
just backup privkey.der and pubkey.der.
address.txt might be handy too(doesn't mean anything but bismuth doesn't generate the new text file if it has privkey.der and it might be confusing if you launched the wallet at least once, replaced privkey and the old address remains). That's your wallet.dat analog