Hello,
First - I've submitted a support ticket on this topic to Carenado and we've been trouble shooting for a week or so... just wanted to see if anyone else had solved this:
I've noticed that in the 2.0 version of the C182T as well as my other Carenado G1000 planes when I hit flight plan button nothing happens and the "CLR" button and the "ENT" button do not work. Here is a video that I submitted to Carenado that shows the problem.
https://www.youtube.com/watch?v=1IogSEYOUhw&feature=youtu.be
When I create a flight plan in FSX the functionality returns and I'm able to edit an existing flight plan but I can not create a new one in the sim. Anyone have this issue or know what could be causing it?