I am IRATE about this as well.  It is UNBELIEVEABLE that they would make such a major change without telling us.     I've been on the phone with support for the last 90 minutes and am not getting a clear answer about whether they are working on a fix to this problem or not.  The last thing I want to do is buy a bunch of 4 up envelopes for God knows where and then learn they've switched the format back to 3up.   Does anybody have a clear answer on this?