If you don't use WormKitDS you're saved, because you can launch W:A instead (since you can host without WK).
But if you don't only have WormNAT 2, try deleting one module at each test, or tell us your modules list.
You can also, if you didn't try yet, try to host with Wheat.
If nothing worked and you're on WKDS, you can remove WormNAT and its components, then (if you still have problems) you can reinstall W:A 3.6.31.0 beta patch, since that will remove WKDS's modifications in WA.exe.