This is more of an annoyance than anything.
Yesterday, TurboCAD 2019 (Build 56.3), changed the way it worked.
1) It refuses to exit; it just puts up the spinning 'wait' indicator (I let it run for 4 hours to be sure).
2) When starting, it prompts me to select a Workspace, even after I had previously started it in Administrator mode and activated the "Don't show this message again" radio button. When I had first installed this version, I specifically chose not to install it in Administrator mode to see if this problem happened (it didn't).
I uninstalled and re-installed in Administrator mode. That didn't help, either.
Okay... did some experimenting while composing this message: deleting the Built-In folder removed the Workspace Style prompt from startup and the never-exit problem, at least for now. I rename my Built-In folders so I can get a timeline as to when they've been changed. Oddly, the first three have the same date for the tcw_ini_*.ini files (11/29/19 3:56 pm), but the most recent one has them dated 12/10/19 6:01pm). That is a puzzle.
TC Pro Platinum 2019, 2018, 2017, 2016 & 2015 (all with LightWorks & RedSDK) & V21
System: i7-5820K @ 3.30GHz, ASRock X99 Extreme4, 16GB DDR4-2133 RAM, Gigabyte GTX 970, Samsung NVMe SSD 950 (256GB), Windows 7 Pro (64-bit) SP1