MARTINB I have the same problem with Version 2.5 on OS 10.4.11
When I launch it, it hangs with 95..100% CPU usage, the application is open, but I can't select anything in the menus and there is no window.
However, version 2.4 was ok (sometimes crashed, but in general it was working) on OS 10.4.11.
(Version 2.5)