Thanks. I copied everything from the musicbee folder on the old computer into the muscibee folder on the new computer, incl the backed up settings and library backup. In the main music screen the setup is as previously and the artwork has been preserved but all the playcounts and last played data are missing. All playcounts are at zero.
For the playlists, they are all listed but the songs in each playlist are still pointing to the location on the old computer and so there are no album names, times, genres, playcounts, etc.