Hi Stephen,
After updating your windows did you reinstall your crysis? To link
your Mod under 64 bit system you need to create a new shortcut from
the folder "Bin64" and copy it to your mod folder/desktop (Program
Files (x86) -> Electronic Arts ->Crytek ->Crysis Wars -> Bin64) other
than the previous one from "Bin32". You also need to change the
"Target" under the shortcut properties by adding -devmode -mod
YOUR_MODE_NAME
Hope it helps.
Rui