Mainstage 3 not installing
I tried installing Mainstage 3 on my new MacBook Pro (OS X 10.8.4). It got through downloading all the instruments, but as soon as the progress bar got to "Installing..." it got stuck. When I started, it said it may take an hour to install, but I left it overnight. No progress this morning. Quit the program, as it said I could complete the process at a later time. It says "Installing..." with no movement. Restarted, rebooted, still says "Installing..." with no movement.
Help, please? Thank you.
MainStage, OS X Mountain Lion (10.8.4)