You may find this doc useful:
https://bisq.community/t/how-to-switch-to-a-new-data-directory/6753
I would be careful when importing files from one OS to a different one.
File formats may slightly differ, and this may unfortunately cause troubles.
Emptying the wallet may indeed be a safe idea.
However, restoring from the seed words may also be an option.
(Don’t forget to write down your seed words before leaving your windows Bisq account !)