Thanks for all the info. My situation sounds very similar to yours. I removed DBR using Add/REMOVE programs in Control Panel and it removed cleanly. Downloaded v1.7.1.2 and performed fresh install. When I ran it, it had my Premium license key so it must have still been in registry and wasn't removed by uninstall. As before, Rescue Disk ran and installed new partition (DBR_BOOT) on WD Passport. But, System Backup immediately stopped with target location disconnected, missing or full. Tried multiple times..... In any case, sounds like you solved your problem, so you as OP should this mark this post/thread as answered. I will continue posting on my other thread.
I have a Dell XPS-8700 running Windows 7.  I purchased the Dell Backup and Recovery Premium Edition. I have been able to create a bootable backup (Rescue Disks) and I can create a Data Backup onto my external hard drive.  However, whenever I try to create a System Backup onto my external hard drive, after about three seconds into the process, it returns: "An error occurred during System Backup creation" . How can I create a System Backup?  Why am I getting this error?
Dell Backup and Recovery - "An error occurred during System Backup creation" 