in the lates version it is no longer possible to add a dvr device.
clicking on continue in the DVR Setup dialog just gives an javascript error:
[Error] TypeError: undefined is not an object (evaluating ‘i.sources.reduce’)
n (main-1-f823eebe2c9373dce804-plex-3.31.1-c2be46c.js:6693:406)
[Error] Failed to load resource: the server responded with a status of 429 (TOO MANY REQUESTS) (store, line 0)