Expose more Greenworks Steam cloud APIs to NW.Js and Electron (1.11.0: Supports Greenworks v0.18.0 for NW.Js v0.92.0, Steamworks SDK 1.60).
Sorry, no, I am not doing development on C2 plugins, I am focused on C3. You could check if the Steam4C2 plugin is still supported, it may have DLC support.