I just verified by creating and opening an SDLPPX package from my translation. Indeed: the extension .CTP should not be added.
I have not changed anything in this respect in the latest update. Maybe you chose another Convert option or it is a problem of SDLPPX extension being uppercase. To be checked...
Is converting to *.SDLPPX useful? I thought only *.SDLRPX would make sense, and as far as I know, CT (and all other tools besides Trados, of course) can't do it.
>Is converting to *.SDLPPX useful?
I'm still not sure.
Hans CafeTran Wiki
When I save a translated SDLPPX via Project > Convert, CafeTran now adds .ctp to the .SDLPPX: example2015-10-22.SDLPPX.ctp
This wasn't the case in previous builds and it is wrong.