Crash at 5% After Patching From 4.07 to 4.13

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Don't know about the M4T mega patch, but it's only three updates, try to just DL and install 408, 409, and 4.10, then the rest. Also, make sure that it is not putting a Il-2 1946 Sturmovik folder inside your il-2 game folder, and installing there.
Easiest way is just look inside the folder for one named il-2 1946 Sturmovik. If one is there, cut the contents, and paste one folder up, then try reinstalling the rest of the patches.

Good luck, and welcome to il-2 Bf110G4NJ

**EDIT** what .ver does it say in bottom left