Has anyone else had this problem? Several minutes can pass between double clicking on Rapture Pro and having the GUI show up. If I try to do anything else in the meantime, I get a whited-out screen and unresponsive SONAR.

Yes. Plenty of threads in the forum for you to read about this.

Thanks, Doktor Avalanche.
 
The search function on this site has never worked very well for me. Searching for this one only produced one relevant thread, and that wasn't specific to Rapture Pro nor did it contain a solution.
 
Maybe somebody would be willing to point me in the right direction.

https://www.google.com/se...e%3Aforum.cakewalk.com

Delete.