I'm using RPG Maker MZ and NW.js (updated to 0.49.1). Thanks for the suggestion - does your SteamworksPlus plugin also work with NW.js? Just wondering because the Itch page says NWjs: [× No]. :)
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Ah... oops... I forgot to correct that. Thanks for your report. Actually, at first I thought this could only run on Electron.js, but later I found out that NW.js could also use the plugin I wrote. Anyway, this plugin can now be used on both NW.js and Electron.js.
(PS. I didn't expect that I forgot to switch back to my itch account to reply..)