Kan, spacedoubt,
If the package.json is correct then this probably has nothing to do with c2. Which version of nw are you using? r190 installer uses 0.11.1 - but you can easily revert to 0.10.5 (much better IMO) by following this guide
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Try the old version and see if your problems are fixed. If they are, then it's definitely a bug with the new version of nw - they can only fix it if you report it to them. Does this happen with both x86 and x64 exports? Are you making any requests to the browser object / nw object?
As far as I understand nw wrapper - if c2 sets the boolean correctly then this is probably not a c2 bug....