did you figure this out, i am using the administrator account and i have given the rights to add objects to the folder ( top level security for the universe) but still i could not export the universe.
I have given Full control for all the folders (top level security) for both Administrator Group and Every one Group ( just to make it work initially;) still i could not able to export the universe. I checked for “Add folders…” rights too ,it says its granted.
(Note: Even i have tried with “Advanced” and given all the options but i could not., then i have given Full control to the Temporary Storage but in vain…)
So you made sure you have complete access to the folders, can you check inthe applications->Designer and see (i would think admin will have full control) but just to make sure “Check User rights”.