There is a way to clean up. Just reinstall and activate the Media Library Folders Reset plugin that comes with Media Library Folders. Click the Database Reset option which will not only remove the table but also remove unneeded records from the posts, postmeta and options tables. Then you can delete the plugin.
ok, thanks will do.
Is it also safe just to delete the table itself or are there linkages in other tables?
You can delete the table, but there will be orphan records left in the posts and postmeta tables.
ok, thanks will do as first suggested.