(updated to v0.31) ProjectSwitcher is a Macroscript utility for quickly switching between multiple project folders. It keeps track of the previously opened projects, saves them to an .ini file and presents them in a dropdown list.
The dialog can be resized to accommodate long path names. v0.3 can also be docked at the top or bottom, v0.31 is using a floating dialog instead to restore compatibility with 3ds Max 2014.