After installing 3567, I mounted a volume from a backup that had been created with build 2337. I then created a full backup using build 3567. When I asked to mount volumes, I got a message from Windows saying that a bew device had been found. I had to reboot. Upon rebooting, I saw that Device manager now listsTWO Acronis TI Backup Image Explorers. I expect that the first was left over because I had installed build 3567 over 2337, rather than doing a clean instal. Do I need to do a clean install? Or must we have two such critters?