I have recently upgraded from 3.8 to 4.1.1 and successfully upgraded the old hack to new version by changing the max version.
Now, the problem is that all the previous thanks are gone and the counter is set to 0.

As stated in the second post, I upgraded the thanks add-on and didn't uninstall it.
Any suggestion for retrieving the thanks database?
regards,
P.S: my question was being answered while i was posting... but which counter should update? I can't see any specific counter for thanks.