Thanks, I talked to TT agent this morning and suggested that issue developed after update to 11.2. Of course I had already deleted a com.....plist fie and reinstalled TT and program is working normally. Previously, I had deleted the file and reinstalled TT and TT worked normally for a few hours. Even 2019 was working normally and nothing was done to correct the problem. We agreed that I would call when the problem reappeared.
