unfortunately, compared to version 3, version 4 is horrible:

1. it crashes all the time (it actually segfaults on 64-bit systems). This can be sort of remedied by running the application in Rosetta.

2. the php scripts are substandard and badly written (generate broken links, etc, etc) - but it's php - i.e. can be edited -> can be fixed

3. the functionality of the app is horrible as well. it floods the catalog with a randomly selected cover artwork and applies it to all compilation sections. to get rid of this effects takes hours if you have a sizable collection.

4. no response whatsoever from the 'developers'

I could go on - but why?

Advice: stay away from this application. It is one of the most dilettantish application I have seen in a long time. The sheer arrogance of asking for money for this 'upgrade' is unbelievable. My guess is that there are no developers anymore and someone who has access to their code had decided to make a quick buck.