Installing Solidworks explorer after the fact?

Yesterday we installed Solidworks 1212, 64bit on a new computer. It showed some errors but Solidworks seemed to work fine. Today we noticed that Solidworks explorer was not installed on the system. So we got out the SW install disc to load Solidworks explorer, but it said it couldn't continue because a newer verison was installed on the system (we installed SP4)!

So how do we get Solidworks explorer installed on this system? I hope we don't have to do an uninstall!

SolidworksAdministration