The download instructions were to uninstall the previous version2 before installing the new ver4, which I did. I had a backup folder in the old ver.2 with a number of files I had removed in it. After I did the uninstall and did the ver.4 installation, I did a registry normal scan. All the files from the backup in ver.2 were now in the scan results. No big thing, I just removed them again from the new version scan and backed up the new removals. If I knew that was going to happen I would have deleted the old backup before I uninstalled, and saved some time selecting.
The installation went well, and the new version is great.