I have the same problem:
Everything was ok before today update of Nuts Poker.
I dont now whether this problem appear because of it or not but now stats not display. I see table at table manager, but its empty (in table manager).
If I click Table Finder, I see message
"I cannot find any unattached hands, please wait until the manager has imported some".
P.S. Today before this problems, I created four folders in folder where poker client saves HH. Then I extract four archives with mained HH into this folders. One archive to one folder, because it contents files with same names. Then I click Start auto import. After import was complete I delete this folders. But I did not change any old folders or configurations. So I dont think that this is the reason. After it I run client and update was happen.
I use v 1.06.03h