If you’re a consultant you probably connect with your Virtual Infrastructure Client to a dozen different VirtualCenter servers or ESX hosts every week. After a couple of months the drop down list “IP Address / Name” gets all saturated and it’s impossible to find the right server… So it might come in handy to clear the list every once in a while:

HKEY_CURRENT_USER\Software\VMware\VMware Infrastructure Client\Preferences

Just delete all “connections” that are obsolete in the “RecentConnections” value.