Hi...
Try right clicking the Cartoon Animator 4 desktop icon and select "Run As Administrator". This may allow CTA4 to launch.
Do also check that your system and graphics drivers are up to date. Outdated drivers can cause software not the launch.
If the problem continues after checking the above, try uninstalling the CTA4 trial and then try a clean install using the Reallusion Hub. This should resolve the problem.
Peter
Forum Administrator
www.reallusion.com