A simple (and somewhat ugly) UI that enables the removal of Servers or User Names from Sql Server Mangament Studio's connection dialog.
Extract contents of zip file to a folder.
Locate SSMSMRU.exe and run.
Delete the server(s) and/or Login(s) then click save or cancel.
SSMS must be closed before you save.
Settings are automatically backed up before save.
Some code was taken from arcticdev's answer on StackOveflow: