Upgrade Adobe Update Server?

I have inherited our Adobe Update Server.  (Hint: I don't know what I'm talking about.)  Due to certain problems, Adobe Support has advised me to upgrade our server from V3 to V4.  Searching the Adobe Support site, I can't find anything about upgrading a server, but do find documentation on creating a server at version 4.  Isn't this all virtual?  Do I have to create a new server at the desired version?  This seems a little like throwing the baby out with the bathwater, but I may not be using the correct search string.  Any push in the right direction would be appreciated.  Thanks, Judy