[SpiralOcean]

Dude! You win my hero of the week!

Very cool.

One problem...
Fatal error. There already appears to be a program installed at /Applications/OmniFocus.app

The application downloaded correctly.
I have two user accounts.
Admin
myUser

I usually have to authenticate to install. I'm assuming this script will handle that? Maybe that is why this error is appearing?

This should probably be posted in the OmniFocus Extras forum.