You can have more than one installation, with the same or different versions, of Rational® Synergy on a given computer, for client and engine software. Your existing Rational Synergy databases can run on one or more servers.
On Windows, you cannot have more than one Rational Synergy Informix® server per computer, even for different releases of Rational Synergy. Installing a Rational Synergy 7.2 server on a Windows computer upgrades any previously existing Rational Synergy servers. It also disables the use of those servers under the earlier releases.