So I had my perfect desktop and everything was running smooth, and then I decided to press one button on the Unity-Tweak-Tool Software and Booom, my unity-panel is gone, I can't access unity-dash and the themes don't apply correctly.

The button that messed up everything [Restore Defaults]:

My Desktop now (no Unity-Panel, Can't access Unity Dash, theme decorations to windows borders doesn't work):

I am running Ubuntu 16.04 LTS