Thank you both for that. It looks as though the search is going to take me longer than the time required to learn a different 2D CAD program. Getting ProCAD going again is something I will have to save for a spare-time hobby just to see if it can be done. I would like to rescue the files created …

I recently lost my venerable 486DX66 computer to a failed graphics card. I had kept the machine simply to run ProCAD version 8.0, a 1990s 2D CAD program that I particularly like. On discovering DOSbox and installing it, I find I can get to the welcome screen but no further on account of a licence …