'Alt' key and Windows 10 hanging up Mule - work around

[Acavia]

I noticed that the 'alt' key, if using Windows 10, locks up the mule client.  It happened to me and some others have done it lately.

To prevent it, I mapped the secondary fullscreen control function, in Mule settings, to Alt.  That way Alt makes my game go to fullscreen instead of locking up.  Or you could set the secondary of any of the other functions to the Alt key to prevent the real function of Alt from happening in your game.