Hi!
Definitely sounds like a pretty annoying problem but I think your old instructions should still be safe.
Since the Levels haven't changed between 1.1 and 1.1.1 you should be able to simply replace the .xml files.
You can find the new levels at
"C:\Users\[YourUsername]\AppData\Local\Temp\.net\BotsAreStupid\[RandomID]\Content\Levels\". Just delete those and replace them with the ones from the stable folder.
This should do it, please let me know if it worked!
Will definitely look into an alternative way of saving instructions for the next update to fix this.
Thanks for letting me know =)