Can I reload a map from a purchased package?

I am using the Curse of Strahd map set. I was editing dynamic lighting on the Wachterhaus map and accidentally cleared all dynamic lighting on all three levels of the Wachterhaus. I tried Cmd-z but it wouldn't undo what I'd cleared/restore what I'd cleared. I still have that map open. Is there a way to get back the dynamic lighting that came with the CoS package for that map? Maybe a reload of just that map or something similar?

There's no undo function for dynamic lighting changes. If you were a PRO subscriber you might be able to use the transmogrifier (Possibly...) to extract just that page, but you're probably going to end up having to redo dynamic lighting yourself, on this one.