I assume you have already done a proper Forum Search for your model number in case other people have already answered your question ?
If so and that didn't help then check out this thread: https://community.sling.com/thread/3300?tstart=0
Come back if it that doesn't help either.
Thanks for utilizing our forums! I understand that you have a DirecTV Genie DVR and we don't exactly have that in our system yet. However, with DirecTV the new Genie uses the same remote and IR coding as their HR series receivers. So I would recommend selecting the DirecTV HR 22 and you should see your exact remote with full functionality!
Hope this helps!
The Sling Moderation Team