The version number displayed in the LG Content Store is not the right number.
The correct version number is available in the Plex app settings or via Authorized Devices. You should have v5.89.1.
The app in the Content Store is not the full version. It is a simple bootloader app. When you launch the Plex LG app, the bootloader checks if an update is available and if on is, then it, downloads the full, current version from hosts at plex.tv.
The bootloader rarely needs updating. That is why the version listed in the Content Store is incorrect.
