Hi Willy,
That is good advice from jepe.
While support@macecraft.com works on that cache update problem, you might try turning it off.
That way you could evaluate some of the product features other than registry cleaning. I think File Finder and Registry Finder in particular to be worth the product price even if the other features were never used.
You turn off cache update from the main tool window using File...Program settings...Network features. You may also have to say no near the end of setup -- it has been a while -- I have forgotten. :
It would be best to wait for a cache update solution before trying Registry Cleaner.
Regards,