As to Producer vs StudioI bought Producer only because Studio was not capable of producing Formant Scaling. Ostensibly Producer was. It turns out that Producer was not able to do do it either ... contrary to what Cakewalk claims. Accordingly I spent $149 that I could better use to (as I said in an earlier post) by a round of drinks at a local bar.
As to the X3e patch not recognizing that X3a Producer existed tell me if this makes sense ... I had to install Producer in a directory that was
not C:/ProgramFiles. There was not enough storage memory to install it there so I installed it on another HDD. Having done this the many times with other programs, I do not recall having an issues with it. I suspect however, that the Sonar X3e [atch install process, limits its search to the default HDD location
C:/Program Files. Since Producer is installed somewhere else the patch fails to install. Rather than go thorough my entire set of programs, uninstall them and then re-install them on a different drive (as I think is necessary) in order to make room for X3 Producer in C:/Program Files I just resorted to forgetting about Producer.
Maybe, someday (in the next month or so

) hopefully, I will get a response from Cakewalk telling me what I must do to resolve the issues I've raised.