I am having a similar problem but restoring the backup files did not restore my prior tabbed dock:
This afternoon, when I woke my computer up, the tabbed dock was missing. I re-installed ObjectDock and copied the backup files, which I copied to C:\Users\Kenneth\AppData\Local\Stardock\Backup for ObjectDock about one month ago, to C:\Users\Kenneth\AppData\Local\Stardock\ObjectDockPlus. This had no effect even after rebooting my machine. I am still seeing only an empty, unpopulated tabbed dock.
I am running a Dell Desktop XPS 8700 with 3.40 gigahertz Intel Core i7-4770, 12240 Megabytes Usable Installed Memory, and Stardock - ObjectDock v2.20.0.850 on Win 8.1 (X 64).
How can I restore the multiple shortcuts and icons that I had put on object dock?