Thanks, Karsten! I bought Motion 5 in June 2011, and that's the only time I've ever used the App Store, so I'd completely forgotten about that.
Maybe it's because I've only used the App Store once, but I'm confused and disoriented trying to navigate my way through it. I finally found what I'm looking for, but now I have a lot of other questions....however, those are for the App Store community.
Thank you for pointing me in the right direction!