sorry there cscs - i poked around the forum before and didn’t see that
anyway, i renamed all the files given the command you offered and (almost) all is ok
one niggle is Firefox; if i launch it from the app menu or an icon pinned to the ‘Task Manager’ task bar, it opened 3 instances - solved by removing the task bar pin, launching it from a terminal, exiting, and re-pinning
anyway, i’m seeing a lot of smallish bugs in plasma 6 - pretty disappointing overall, and given the history of KDE, i expect them to be fixed eventually … and replaced with new ones
6 is alpha, beta at best, and never should’ve been released IMO, but that’s not your concern
thanks