How do I roll back to previous export for a batch/whole catalog of synced photos?

[bsshank]

I edited a wedding and exported them in color, then changed them to black and white, synced them all, and, exported them again.  A week later, I realized my exports were only set on medium-high quality. I need to roll back to the first export.  Can I do this as a whole batch or do I have to do all 1050 photos one at a time in the history panel?  I hope not, I edited 3 weddings like this. Ugh! 

[dj_paige]

If you backed up the catalog file before changing to black and white, then that's what you would use. Otherwise, I think you have to undo the editing one photo at a time.

[GoldingD]

In the future, consider the use of virtual copy's, and exporting to modified file names.

hmm, so edited for color first, then did you add additional edits to go B&W? And as such, the history includes all those edits all the way to B&W? If so, consider creating Virtual copy's of the current state (B&W), then edit the non virtual ones as to remove the steps at the top of the history that converted them to B$W. Simply (unfortunately one at a time I suspect) Click on the history state before the conversion to B&W and forget (clear) the steps above. Do not have any form of sync set. Do not have any of the virtual copy's selected. Test first.

[Rob_Cullen]

Just a thought- Not knowing -'How you edited in B&W' is it possible that you could-

InGrid View, Select all, Press keyboard [V] ?  [V] toggles Color<>B&W.