I am assuming you have been upgraded to version 1.2.1. Apparently for some people the software erased their wish list. I have copied the relevant portion of an on-line chat with BN in reply #39 in the thread entitled (I was unable to paste in a link, I am not sure why),
Update to 1.2.1 for Nook Simple Touch
Hope that makes you feel like you are not alone although it most certainly won't help.