The steam_emu.ini file is a brilliant piece of reverse engineering. It turns the monolithic Steam DRM into a set of checkboxes you can edit with a notepad app.
Enables or disables specific downloadable content (DLC) by listing their respective IDs. Steam-emu.ini File Download--
Try moving the entire game folder to a less restrictive location, such as C:\Games\GameName . Configuring the steam_emu.ini File The steam_emu