Coral Painter 2019 does not respond when launching it

I am trying to post my concern again after someone flagged my previous post as spam or abuse for any reason.  So hopefully it is working this time. 

Coral Painter 2019 does not open when I launch the application. I am using macOs Mojave (Version 10.14.6). Everything worked when I used the trial version. Then, I registered and used the license I bought a while ago and it was not responding any longer I deleted all customizations for all workspaces but nothing happened. Then I uninstalled and installed the program again. Sadly, nothing changed. 

I would be grateful  for some help!

Maren