I just downloaded and ran version 1.55. I selected Backup before delete and chose to delete all detected entries. In the backup folder I now have clean-24-12-2007-10.49.28.reg, Flashplayer9.reg,, FixAddRemove.reg, and Restore Desktop Icon Pos.reg. I can only assume that the Regedit designers consider that the user might want to restore Flashplayer, FixAddRemove (whatever that is) and the Desktop Icons independently from other registry entries.
Hi justkevin. I've never had problems with deleting all detected entries - the backup is just in case this goes wrong, but in several years of using Regseeker it has never yet let me down. If you want to err on the side of caution you can delete only green entries, these are the ones Regseeker is confident are safe to delete. The red entries it has less confidence over, but I always delete the lot.