Someone may be able to provide an explanation if you were to upload your Ror.log file (found in C:\UserFolder\Documents\Rigs of Rods 0.4\Logs)
And also if there was any errors that popped up on the screen you should screenshot that also and post it so someone could help you a bit better.
There is a way. All you need to do is go to the advanced tab in rorconfig and switch the input grabbing to dynamically, and when in windowed mode you'll be able to use the mouse outside of the RoR window.
Ulteq has begun work on an exporter for the latest blender. It's in the RoR Discord server. Pretty soon we may possibly be able to forget about 2.49b
Also if anyone didnt know, a feature I liked in the RoREditor was the ability to snap nodes to grid, but in Blender you can do the same thing by...