I had the same problem. Sometimes i couldn't get new versions to load even after refreshing or reloading or uploading a new game version.
When you export from C2 there's a file called offline.appcache if you remove that file from your host the game will always be the latest when you refresh.
I don't know what this file does, but it's causing the game to always use a cached version instead of the new one. Very annoying.