i found the following articles to be most helpful in setting up my own Plex server as a replacement for Windows Media Center. Click the “read more” link below to get to the article links.

Setting up and Configuring a Plex Media Server

Plex review (PCMag)
Plex beginner’s guide (WindowsCentral)
How to get started streaming with Plex media server (Comparitech)
Quick-Start & Step by Step Guides for Plex Media Server (Plex Support Article)
Plex: App Information (TiVo Support Article)
Plex Android app (Google Play)

In addition to the TiVo Plex app, current TiVo users may be interested in the following recent developments

TiVo announces plans to merge with entertainment tech firm Xperi (Engadget)
Xperi and TiVo to Combine, Creating a Leader in Consumer & Entertainment Technology and IP Licensing (TiVo Press Release)
TiVo wants to make a comeback with $50 Android TV dongle (Engadget)
Tivo Series 7 (Tivo ‘Edge’) DVR Made by Arris (Variety)

Other news

PC shipments grew in 2019, ending 7-year slump