Please give more information, such as OS, C2 version, NWjs version.
This will help us to try and determine your problem.
As you are trying to export using NWjs, then minifying is not really necessary, especially if just sharing with friends.
My Specs :
Processor : Intel(R) Celeron(R) CPU 887 1.50Ghz
RAM : 2.00 GB (1.79 GB usable)
32-bit operating system
Service Pack 1
Java 8 Update 77 (32-bit)
Construct 2 r213
NW.js v0.12.0 (Chronium 41) [r216 and older only]