I attempted to sideload it by taking the APK from another device, here's the error.
Failed to install {filename}.apk: Failure [INSTALL_PARSE_FAILED_NO_CERTIFICATES: Package com.teamviewer.quicksupport.addon.lg is signed OEM key by unknown route.]
The Play Store reports that this hasn't been updated from 10.0.3086 since May 19th, 2015.