You bought a device from 2012? Send it back as long as you can… If it was cheap and used, it is a maybe. Still, such an old device won’t give a lot of fun.
To use it with plex you need to install HRTunerProxy on your Solo2:
PlexDVR Setup.
From OpenVix build 5.0.015 a new plugin is available and is coded for use with Plex DVR/LiveTV, download here http://www.openvix.co.uk/index.php/downloads/ , other teams also have support.
This will allow you to use Plex’s DVR/LiveTV system to record shows from your E2 box directly into your Plex library, and also view LiveTV! on your Android / IOS devices. The EPG system in Plex is powered by Gracenote.
PlexDVR/LiveTV! is ONLY available to PLEX PASS members at the moment and y…
DL @ GitHub - OpenViX/HRTunerProxy: Setup Enigma2 to act as HR-Tuner Proxy
Dunno if it will work with your Methusalem.
The STB will then appear as an HDHR device for Plex.