I'm using the 1.3.0 version of NW.js (I just updated this morning). Not sure what the Electron.js is for... is that required with NW.js, or is it like an alternate version? The installation instructions didn't seem to mention it...
I did manage to launch the exe directly through steam. I was initially getting an error that prevented me from installing the uploaded build but that went away when I restarted Steam. Now I'm able to boot the exe from steam but I still get the above Node error message.
I am using Windows 11.
EDIT: I started the process from scratch using the files in the Electronjs folder, and I am now able to boot the game from Steam successfully! However, it appears I am still unable to actually unlock achievements. Pretty sure I configured the plugin commands correctly and all that, but I'll dig through everything again to make sure.
Do "NekoGakuen_SteamworksPlus.js" and "NekoGakuen_SteamworksPlus_en_US.js" need to be on the same version? I notice that the former is 1.3.0 and the latter is 1.2.1