I am having the same error. This is the error according to Windows.
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EventType : clr20r3 P1 : eq2map_updater.exe P2 : 1.1.0.2
P3 : 492ff6cf P4 : mscorlib P5 : 2.0.0.0 P6 : 461eee3d P7 : 1e72
P8 : 0 P9 : system.typeloadexception
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I re-installed the .net framework and still the same. It started out of nowhere before I installed the new version.
Anyone figure this out yet?