2.4 would give you more range.
5.8 is more reflective and will work better around cover and obstructions.
I would leave it in dual mode for the best of both worlds.
I had the same problem last year with a new Windows machine. It turned out to be a problem with Premiere Pro.
I signed up for their beta tester program. The beta version worked flawlessly. A couple of months later, they had an official release...