Thank you - this was all solved by searching for backups of old installers, and either reinstalling (with later updates - in sequence) or taking out wanted files from the extracted install folders.
I noted that some older vstsound files could not be managed as I would have preferred using the Library Manager and always re-installed to the fixed default location. This meant that I then had duplicates of many files in different places, and library manager identified and selected the ‘wrong’ duplicates to delete. Manual move/delete was necessary.
Moving these files in some cases then forces creation of similarly named shortcuts when the files could not be found where expected in the old default locations. This is OK since I just wanted the large vstsound sound files all on a separate drive. The *_presets.vstsound don’t take up much room and previously I had left them in default locations.
Thanks for the pointers to help me out.