The Record option is gone in the favorites swipe down menu since upgrade a few days ago. Wife not happy 
Hmm, do other DVR features work?
Are you able to click a future item on the Guide to see a record prompt?
You can try quit and restarting the app, by clicking TV/Home button twice and swiping up.
I can watch recordings. Not sure if the series function works for certain. I can’t select a future show from the guide, and trigger the record options. I killed/restarted the app a few times, no change.
However, the option is available on one Apple TV. All are running version 2.1.31
I have 4 HDHomerun Primes, 2 of which were added a few weeks ago. Does the DVR max out support to, perhaps, 2 HDHomerun boxes? I have 4 currently, strewn across 6 Apple TV’s
Hmm, no limits and there weren’t any changes in 2.1.31 that would cause this behavior. No one else has reported any problems and the app works fine for me.
Can you try click-and-hold the first checked HDHR on the Settings tab and click Refresh Device.
Also check to make sure all your HDHRs have guide providers assigned on the DVR web admin.
Bahh, been so long since I initially installed the DVR app, I forgot to jump in and configure the guide providers for each of the new boxes. That was it, thanks for the guidance!