I have the same issue and have searched everywhere to try to find out what happened when I found this question. I had chosen to go back to the old format but it has changed back to the new and not given me the option again. When this update was done it also changed some of my settings and I'm having to go back and try to find those again. I do not like this update and I do not like that we don't have the option to choose to attach the pdf to the email. My clients don't want the copy of the invoice. They want the attachment that I provide.