"Is the 'Draftsight Cad' still running OK?"
Yes, I guess they put out a newer version of the beta package so you need to download that and reinstall.
Once I did that, then re-registered all is well again.
Something to do with a software dongle that disables the older version (not sure how that works).
Hopefully one day there will be a "normal" solution (i.e. version in Debian repositories) for running (Acad Clone) CAD in Linux (probably not in my lifetime, however).
I haven't installed it in Sparky, I think I'll leave Sparky for play and keep CAD in SolydKBE. (BE is my work horse, work base).
I did, however, set up Sparky to run Netflix and it works great!