Ok after changing "." and "," under Control Panel/Region and language/Advanced like in the screenshots speedo, rpm, oil temp, oil pressure and water temp are working. You have to do a reboot of your OS to make the changes take effect. Otherwise the app won't start. But i have two issue left: 1: The rpm cursor does not match the one in the game. The lower the gear, the more the cursor is going crazy and turning around a few times. 2: Poor performance. I'running the chrome window on a second screen. When the app is turned on it's lagging but fraps is showing 60fps. But this seems to be an issue of my system. When minimizing the chrome window everything is working fine.