Same problem occurs for me : Launcher error 3 secs after starting the mission (in lowest settings)
Foo'Bar I've got 443 files in my C:\Users\YourName\Documents\1C SoftClub\il-2 sturmovik cliffs of dover\cache\shaders folder.
I guess I should remove them ! Right ?
[Edit] : working after folder clean-up ... thanks Foo'bar