Ah, is your issue with cloud saves how to move a local save into the cloud? That I'm not sure about with this game, TBH. Having placed the save under that /remote/ folder, I would have thought Steam would sync it up to the cloud next time you exited the game. Does the game show in Steam as the cloud synced okay? Does it show here?
Your launcher shows you are still on game version 1.7.2, is that deliberate? Current is 1.8