Lets you change your active view to any camera you wish. This has several advantages over the current change viewport to camera options in max. First - the list it offers is alphabetical. There's also more room horizontally to see the full name of the camera. And it also resizes itself to the number of cameras present - so avoiding unnecessary scrolling.
v 1.14 Added an apply button that will switch the camera view but not destroy the dialogue.
The only major differences between script packages are slight version compatibility issues - there are no new scripts added between the 3 packages.