Since this morning the Plane Manager won't open. I've tried to open it directly (Plane Manager in the menu) or indirectly (selecting "new plane" in the Cutting Plane View). I've already restarted TBC several times, I've rebooted my computer (win10 64bit - version 19.09 build 18363.836) but nothing happens.
Somewhat strange because I didn't do any updates not to Windows nor to TBC nor to the graphics driver. Very annoying.
TBC 5.20 (5.20.7286.17026)