Somehow I have managed to delete my Sea Campion objects from my Mega scans, 3d plants, ground cover library. The preview just shows white boxes and there seems to be no option to re-download ie no little downward arrow in the top right of the selection - How do I get them back?
Check that you are logged in with your account. If you have already downloaded it and it got damaged, you will need to delete the folder where the downloads are stored in Twinmotion and download it again.