That version you see in LG content store is a loader only, normally updates occur automatically on TV start up.
Announcements:
To check your LG app version you can go to the apps settings/about or visit your Plex Server settings /Authorised devices.
The current LG app version : 4.27.1
You may benefit by adding your Server’s LAN IP address to LG settings / Manual Server. Port:32400
