Cubase 5 how to go back?


I just did a channel export for a project and suddenly all the individual tracks relocated themselves out of sync…

I cannot (ctrlZ) back to the original stucture.

I have tried to use the BAK files but they do not show me the project as it was before…

Is there any way that I can restore the original synchronization as it was?..

How to undo/restore/go back??