Running Mojave - Cannot Upgrade Logic Pro

I'm running Mojave and cannot upgrade Logic Pro X. I'm attaching pictures to show what I mean. (I had a similar post before upgrading, and it was recommended that I upgrade to Mojave, but that didn't resolve the problem.)

It was upgrading fine for quite some time, but something happened at some point. (It happened when Apple added the App Store to computers.) I was busy and didn't worry about it because I had an old computer and thought it probably couldn't handle the upgrade. I moved everything over to a new computer a year ago, and the App Store still doesn't seem to recognize that I have Logic. It wants me to purchase it again. :(

That's my current version of Logic Pro X.

Here's what it looks like when I'm logged into our App Store. Does anyone out there know what's causing this? I desperately need to update Logic. It crashes continuously. :(