ays I need to buy a license. I am guessing there is no way around that?
Node Webkit is free to use, independent of C2 - you can grab it and manually package any HTML5 app into a NW package - Construct2 simply does automatically for you all the tedious setup work ;-)
Considering the ratio of incredibely useful features to a very reasonable price, I'd say it's better to buy a license for C2 than to waste time with manual export to NW ;-)
Cheers,
Greg