Be patient folks,
The people who build the offline missions are all volunteers that are doing what they can for the whole community and I am grateful for their efforts. Perhaps, instead of criticizing, everybody line up and help. I can't speak for HTC or anybody else but, as a person who has tried to build offline missions and failed spectacularly, I truly appreciate the efforts of the people who have succeeded and put this piece of software in the package that makes the OL missions available to us. There are several offline missions that work right now that will challenge you and are extremely enjoyable. The people that put their time and effort into building them are doing their best. I say we support them.
And, frankly, if if I can load and fly an offline mission with relative ease, I'm somewhat confused if everybody that can walk and chew gum at the same time can't follow simple instructions for loading and flying one. But that's me and only coming from my perspective.