As explained here:
http://www.fsdreamteam.com/products_cloud9.htmlIMPORTANT
If the Cloud9 product you purchased doesn't have an FSDT updated installer yet, you have to install the Cloud9 product first, then update the Stand-alone Addon Manager
So, either delete you old Cloud9 installer and download and install the FSDT updated installer (better option), or update the Addon Manager AFTER you installed the F4.