Need help transfering TaskPaper to a new machine

I just got a new MBP and I want to transfer the license from my older machine to the new machine, but can’t figure out how. I ran across a similar thread, but none of the tips there got me running again. BTW, I originally purchased Task Paper in the Mac App Store.

Please Help! Thanks!

If you purchased an app in the App Store, then install it on your new machine from the same App Store account.