In updates you can download transposer 2 for c6 pro free but must have your c5 pro serial no when install, you have to open file with zip or winrar.
Some people uninstall 5 first as the update hits the 5 transposer first, install 6 then transposer then put 5 on, or just rename your 5 pro folder so transposer don't see it, as some people have done that.
I have not installed my transposer yet.