I am developer and a game engine hobbyist. I am impressed with what the BMS dev team has accomplished considering most of it is during their free time. I am writing this more for the people who are willing to contribute and do not know where to start.

First out of courtesy to spare BMS dev time assume it takes a lot of time to manage projects with inexperienced developers. It requires teaching and code reviews. So being prepared when offering your contribution is a good thing.

Good developers are curious and tenacious so I decided to post some links for people to know what they may be getting into.

First get the FreeFalcon code from github: EDIT By I-Hawk - No links to the FF open source repo please
Assume that parts of the BMS code will share some ancestry with that code. Don’t stare at the code but at least be able to tell what part of the game is written where. For example terrain, campaign, flight sim, AI, memory.

If terrain is what you want to do then start here.
http://vterrain.org/
Look at Rendering, LOD, papers and implementations. Most papers are written by PhDs, but at least learn different terrain representations and rendering techniques. Unfortunately most of those papers are outdated because they are not up to the modern GPUs capabilities.

The best paper and implementation I have found so far is this so you can skip all of the above:
http://www.frostbite.com/wp-content/uploads/2013/05/Chapter5-Andersson-Terrain_Rendering_in_Frostbite.pdf

Finally for large worlds floating point arithmetic is not accurate enough. As a rule of thumb with 32bit floating point representation you have 7 decimal digits of accuracy regardless of decimal point. So read about rebasing the origin for large world, even better look here:
https://www.microsoft.com/Products/Games/FSInsider/developers/Pages/GlobalTerrain.aspx

As you can see that is a lot of information and mastering each piece can be a Phd thesis, but just being familiar with the problems and solutions I think is interesting enough.
Best,

VJoy with bms 4.32 and 4.33 works on m my laptop from win7 to win10.

Try running Falcon BMS in windowed mode.

It is great that the community is continuously improving the sim and such discussions help a lot. I have also noticed that many missiles especially ARH have updated thrust, weight, drag and more since BMS 4.32. Yes, it seems harder to hit but also easier to drag the missile into losing its energy. Above 30,000 you can even score a hit BVR with aim9x from 15nm head on, split s and escape an AMRAAM fired at the same time, which of course is very effective against human opponents  In the sim it seems that the aim9x having less drag keeps its energy much better than the bigger aim120. So even though it has less burn time up high it has a matching BVR reach. I have also noticed that the aim7m perhaps not updated does not lose energy as fast as ARH missiles thus giving it a very large no escape zone, also surprising to a human opponent who may laugh at the fool bringing old generation missiles to a fire and forget range 

I have win10 and had the same problem. Try running it in windowed mode. Launch->Configuration->Hardware->External Displays->1. Cockpit Displays to External Window.