Here a quick heads-up. With Steam dropping support for WinXP and Porting Kit auto-updating the steam ports, the game didn’t work properly anymore in the Windows 7 Environment port. So I fixed that for Age of Empires 3. So everyone experiencing the issue, trash the old wrapper and reinstall the new one and start the fun! I also checked Age of Empires 2 HD and that one seems still to run fine. Besides that the launcher has some more colors then before :P, it launches fine for me after a clean install.
Get the Age of Empires 3 port up here… or find it on the server tab on Porting Kit.