This happened to me too. I have downloaded MyHotspot and although it works, after I uninstalled it, the LAN interface resets. It doesn't disable it entirely, but I believe this is normal for all these apps that work with network adapters. If it's disabled, simply right-click it and choose Enable.
If you install a VPN client or some application that works exclusively with the network adapters, you'll see the same behavior regarding adapter disable/reset, therefore it's normal for them to do this to work properly.