This morning I bought the Producer expanded and the PC4K Expander. But  with the download files was also de update Sonar producer C with the information you must install this first,
but....... I have already this update C installed I Think one monthe ago!!!. Do I have to do this update again????? Is this  a new update C ???Thanks for  your answer, because I think that it is not  need tot use this  orf do I make a mistake????
Ron Eerhart
The  Netherlands  ( Europe)!!!

No. If you already have X1C installed you can skip that part.

It was only intended for those users who weren't already updated to X1C

You would have got a reply a bit earlier if you'd posted this on the X1 forum (or read the numerous queries already dealing with this very subject)