If you choose to install the beta you must first uninstall One Care 1.6. You will also have to perform a new full backup before you can continue with incrementals because One Care will not recognize the backups made with v.1.6 as belonging to the upgraded computer ( the old backups can be recovered and used but that's another conversation). My suggestion is to not install the beta at this time since One Care 2.0 will be released soon and you will receive it as an update to v.1.6 which will retain your settings and current backups.