True Image Home 2010 -- Destroyed bootmgr

I tried to clone a disk yesterday using Acronis True Image Home 2010 yesterday, and it deleted the bootmgr from my boot drive. My Win7 Pro x64 system drive is internal. I have four removable data drive bays. I put the source and target into these data bays and proceeded to do a disk clone, choosing the two drives in the removable bays. I kept getting a message saying "You must reboot to complete this operation" which made no sense whatsoever. When I did finally reboot, the bootmgr was missing from my system drive and the machine would no longer boot. I had to use my Mac to create a recovery disk and then restore from backup. THANKFULLY, I do make backups on a daily basis, and Acronis was able to recover the machine. But this should have never happened in the first place.

Question: does anyone have any idea why TIH 2010 would have done this? Is it a bug that is fixed in later versions? I don't want to pay to upgrade if it's just going to have this issue as well. I need to be able to clone drives.