I had a similar issue with a version of iMovie. It was persistently current and not current. I clicked "Install" whenever it was available and eventually it changed to "Open".

When all else fails, restart. A Package component may not have gotten cleaned up during the installation.

On a Mac since 1984.
Currently: 24" M1 iMac, M2 Pro Mac mini with 27" BenQ monitor, M2 Macbook Air, MacOS 14.x; iPhones, iPods (yes, still) and iPads.