i updated the game, but when i tried to carry on with my save file, there was no new content
no idea what you're doing wrong. There is one full episode added. Download the game, unzip the folder to its own folder (DO NOT overwrite your old game folder - this can cause some issues sometimes). When you save your game, always back up a page or two first when you reach the point it says "please back up a page or two and save".