Back on topic, a quick update:
You can get the old node-webkit (0.10.5) at this address:
https://github.com/rogerwang/node-webki ... d-versions
The only drawback is that the "dxwebsetup.exe" file is not included. This isn't actually a part of node-webkit, but it's an installer that's packaged with node exports from C2, and C2 places it in the same folder. If it isn't installed, the export may run in canvas2D mode.
However, this file is already in the new "NodeWebkitForC2" folder, and it has the same hash values as the file from r184, so I must assume it's identical.
There is also one extra file in the webkit download from github: "nwsnapshot.exe". This doesn't need to be copied over.
tl;dr: If you've already installed r190, just download the windows 0.10.5 version of node, and replace the files in 'C:\Program Files\NodeWebkitForC2\win32' with the ones from 0.10.5, making sure to leave "dxwebsetup.exe" in the folder.
If you're still on r184, it's easier to go about it the way outlined in my original post.
I'll update the main post when I can.