Batch reset "reset Settings"

Soooo, I screwed up.  I have 3500 images in my catalogue.   I did all sorts of cropping and metadata etc to them.   Then I used a plugin to batch change the dates.  Because the plugin works "behind Lightroom's back",   i had to go Metadata --> Read metadata from files.     However,  because I hadn't saved the metadata & changes to the file,    when it finished,  all my crops & metadata were gone.    CRAP!   Now,  if I go to develop module and chekc out the history,  the last thing done on all 3500 pictures is "reset settings".    Is there a way to delete the "reset settings" command to all 3500 images at once?     Doing that command 3500 makes me want to cry.