I have upgraded to the latest mac OS 10.15 (Catalina) and the app isn't working, installs but I can't get it to open at all.  No error messages other than to send report to Apple.

Cheers

Cranky

Have you tried downloading the latest version of the app, then uninstalling and reinstalling that?  If you had it installed before it's possible that you have an old version saved and need the latest one to run on the new OS. 

Tried that, no change unfortunately

DJNG.DDJ . I expect that they will have a 64bit app or patch like nearly every other developer has.  My advice is that Catalina is live and no longer a beta release.  

In any case to hear from Plarium would be nice.