I'd install 8.3.1 directly for the adding of the extra content and stuff, but if that's not an issue for you, then no. Be sure to install dimension pro before installing the 8.3.1 update, since it updates files from dimension pro. Then upgrade to 8.5.3. HTH, D!J!X! -----Original Message----- From: realmusicians-bounce@xxxxxxxxxxxxx [mailto:realmusicians-bounce@xxxxxxxxxxxxx] On Behalf Of Tom Kingston Sent: Friday, August 20, 2010 9:17 PM To: realmusicians@xxxxxxxxxxxxx Subject: [realmusicians] Upgrading Sonar 8.0 Producer to 8.5 I just restored a clean image of my C drive and installed Sonar 8.0 Producer. Can I go straight to 8.5 or do I have to run any of the 3 or 4 upgrades to the original? Thanks, Tom