Ever since I had this problem I have started to save my project in FTB, exit the program and restart the computer. And voila, it has worked OK for quite some time.
It is possible that the syncing cannot start with a clean slate if you have working on the tree, perhaps generated a few reports etc.
I hope that the above will work for all who ecperienced this "96%" problem
exactly same issue
I have 3900 peoples in tree.
Please try downloading the newest build of Version 7.0, and this should fix the problem:
Esther / MyHeritage Team
I have the same problem with version 7.0 Build 7105. tops at 96% in Step 1.