Hi again Technogeezer- your fix for my Broken Pipe error works well, but I have had a few recurrences in recent months without any obvious causes- no new program installations or upgrades that I initiated.  I tried to open my VMFusion program today and the Broken Pipe was back.  As requested, I have noted any recent upgrade activity.

I had last used the program on 15/2/23 without any problems.  The only auto-updates are listed in System Information/Software/Installations since then were Microsoft Teams, macOS Monterey, Norton for Mac.Universal, TeamViewer, Microsoft Autoupdate and some XProtect files from Apple.  I have made a screen shot of the listing below if that helps with your analysis of the problem.

Fortunately I keep the "Fix" in an accessible place as this still seems to be happening, although only rarely.