Thank you Ehtisham.
I tried this, and, after a fashion, what you describe happens.
At least the solution works, which beats having to remove TC and reinstall.
Will this be fixed, any time soon?
You can design without engineering, but you cannot engineer without design.
Using Win 10 with Designer 2017-2020 and TurboCAD Pro. Plat. 2018-2020 + Lightworks (64-bit versions) + AnimationLab 5.2.
Windows 10 Pro (1909) 64-bit