As you've said you can see a procedure called Patch Management Message try this:
Using a Master account go to System > Preferences - tick the box beside Show shared and private folder contents from all users - Master Admin Only
Now go to Agent Procedures and use the search facility at the top to search for Patch Management Message - You should now see the procedure as you'll have access to everyone's procedures.
If you can't see it through here then I'd advise that you log a ticket and get Kaseya to remove it from your SQL db. Unless you're happy doing that yourself.