Ah damn! I renamed “bisq” to “Bisq” as app name and that is used for the data directory as well. so you have the old version in the “bisq” app dir and the new fresh one in “Bisq”.
If you have not done anything on the new (empty version) you can simply move over the content form the older folder (“bisq”) to the new one (“Bisq”).
Other option is to start with that prog. argument: --appName=bisq
I will look into it how I can fix that…