So here's the issue, the app did get updated, and the previous version of the app started crashing on the profile loading screen actually. I will upload the newer one but i doubt it will work because of the TEE, but it may work.
My stick is also rooted and i do have the latest version of the app as well as latest TZ installed.
If you do have a rooted Firestick 4k then you can follow
this thread, this will patch your OTA both on OOBE and the System (means it will block the system update, and will not force you any)
It will fix Accessibility, so you can use FireTV Settings instead of Launcher Manager (You can have both stock and custom launcher installed like older times, with app store and everything working, except Peacock TV which i think doesn't work for you as you are already rooted)
And you can also have access to AppWidgets on your stick, this fixes this also.