I'm afraid there has been a slight misunderstanding. The AMT remains the same. It is linked to one file on one computer. Since the AMT doesn't change, the invitees aren't lost or changed. Here is what is happening. I'm using the same name for the file and the AMT so they are easily identifiable. The AMT Name is Smith Roots The FTM File is named Smith Roots.ftm Step AMT | Desktop (DT) | Laptop (LT) | | 1 Smith Roots | Smith Roots | no file in first step synced (DT) | synced to AMT | | | 2 Smith Roots | Smith Roots Old | Smith Roots new synced to (LT)| not synced | restored from (DT)backup | (delete from DT) | synced to AMT | | 3 Smith Roots | Smith Roots | Smith Roots (old) synced (DT) | Restore from | not Synced to AMT | (LT) backup | | synced to AMT | (delete from LT) You delete the old files so that you can restore the backup to the original file names. You cannot have one AMT synced to both the Desktop and the Laptop computers at the same time. Hope this clarifies things. BJ On 2/4/2014 11:01 PM, John Maynard wrote: > At 10:08 PM 04-02-14 -0800, H R Worthington wrote: >> There is one issue to consider, and it may not be an issue for you. >> You MAY have to re-invite anyone to your Ancestry Member Trees that >> you have invited to your first AMT. >> There may be some clean up of AMTs and Family Files on your >> computers so that you KNOW which is THE ONE FILE that is Syncing with ONE AMT. >> Russ > Hi Russ. I'm saving this thread. If FTM-2014 can link to two > computers with minimum fuss and bother that's fantastic. Ancestry now > has a feature where you can invite people you've previously invited > to your other Tree(s) to your new Tree. One Caveat: make sure you > invite them to your new Tree before you delete the old one!