In the off-chance anyone has a solution:
After upgrading to PLAY 5, and after loading my old VEPro 6 template, as soon as I would hit play on the transport bar of Logic X my VEPro application would immediately crash. So far I have ...
-Reinstalled the directories and reattached play libraries via the installation center
-rebuilt the template
Both of these have netted the same result. Immediate crashing.
My latest experiment—I loaded the same template that was crashing consistently, but removed any instance of PLAY from it and it is now working. Removing play made the template functional again. Obviously this is not acceptable and I will continue tinkering to make it work, but In the off chance that anyone has experience/solved this, would love feedback. Thank you.
Update: I added back ONE instance of play to the template which I stripped of play and it started crashing again. I then removed that instance and tested again and it did not crash. I repeated this multiple times. It appears to be play causing the issues.