I keep receiving a popup whenever I start Bisq saying my Tor V2 address is getting depreciated. I followed this guide to upgrade my address to a v3 one: Changing your onion address - Bisq Wiki
Steps I took:
Closed Bisq
Deleted the hiddenservice folder in my data directory
Reopened Bisq
But Bisq still starts with my previous address. And the hiddenservice folder does not get recreated in my data directory.
That was going to be my suggestion.
If you have anything you want to keep on your account (wallet balance, trade history) you could move the data folder elsewhere, and then restart Bisq so it creates the data folder from scratch.
Then close Bisq again, and use Restoring application data - Bisq Wiki to selectively restore what you need except obviously the onion address.