Ventrilo MIX Version 5, this includes Ventrilo 2.1, Ventrilo 2.2, Ventrilo 2.3 and TeamSpeak 2 all in one install! You can even have multiple versions of Vent open at the same time.

All you need to do is uninstall all your vent versions and install this. It should  remember all your Ventrilo server details, but is possible it will not remember the passwords, so check with the people on your ventrilo servers before you sign off to uninstall.