I'm having the same problem, I'm sorry if I'm hijacking this thread, but it seemed to be the right place for my problem.
I have freshly installed DCS via Steam on a new computer and I am having the same problem as described, the ED logo loads but then fades away to black, with only the DCS menu music playing. I have the Open Beta but my folder within savedgames is just DCS and not DCS.openbeta, so I don't know if that is at the root of any problems. I also do not see an ImagesShop folder (I don't know if that is a function of this being a fresh install or it being via Steam) so I can't seem to try that technique.
I think I have attached my log correctly and I apologize If I have not done it properly.
I believe the section in the middle of the log was created purely due to my attempt to launch the DCS in fullscreen (but I really don't know).
It looks to me (a person lacking tech skills) that line 150 may be the root of the problem. It says:
UIBASERENDERER: Cannot load font [C:\Program Files (x86)\Steam\steamapps\common\DCSWorld\dxgui\skins\fonts\]!
dcs.log
MY FIX: I launched DCS from inside the AMD control panel and it completely worked. After setting the resolution settings I desired I then tried to open it from Steam and it worked perfectly as well. I don't know if my problem stemmed from the graphics driver not knowing what to do with DCS or something else, but if those having problems have the option to try this I would give it a shot. (IDK if Nvidia has a similar game launching feature)