Thanks, thought it might be something like that.
After manually copying the state directory over from the old computer, did manage to get TurboTax 2020 (both Deluxe and Business versions) to load OK.
That is probably good enough, since have copies of the tax forms themselves for all years, and at this point don't expect to make any changes for those older years, just thought as long as had space on the new computer, would install them for 'completeness'.
