The bad this about this is now the page count stats are going to be messed up.
I am going through mine and changing the ebook edition to the paperback that are missing covers. I never got an email either so thank you for this thread!
Oh I found a way to figure out which titles are kindle edition. Export your GoodReads library using the export function and open the file in excel under Binding column you will see which edition you have. Makes it so much easier!