Alternatively, if you do not want to do a fresh installation, you can add the following to you hosts file and run a manual update to get the updated version:
I have an issue today. I have a big slowdown during computer start. Restarted and obtained a slowdown other time. I thought that the last app installed was CCAV upgrade. I uninstall CCAV and start OK without any slowdown. I install CCAV and try restarting some times. All OK now.
When i installed RC some days ago i done a upgrade without uninstall-install.