On page 12 of the Control Tutorial, it says the Virus patches are stored here:
/LibraryApplication Support/Access Music/Virus TI/Patches
For some reason I don't have an Access Music folder in Application Support (or anywhere on the Mac for that matter).
I have left my crystal ball at home but I assume you are running a Mac. If the driver installed correctly you should have two 'Access Music' folders. One in /Applications and one in /Library/Application Support. If you don't have them reinstall the driver.
On a Mac, you may have two or more "Application Support" locations. The main one will be on your OS hard drive @ /Library/Application Support (which is where you are likely to find your Access Music folder), and one will be in your User folders @ /Users/BlahUser/Library/Application Support (which will probably not have an Access Music folder.)
This is correct. The "user" directory won't hold any Access folder under "application support". This is only the case in the root library directory.