Can not see Project Explorer in the left side and the Code window in the right

I used to have my Project Explorer in the left side and the Code window to the right. I might have docked/undocked something and now I cannot see both screens at the same time.

On the view tab, I can see the code, project explorer, local window and watch window.
So far, I have checked and tried docking and undocking on the tool-options and nothing seems to work.

I have spent all day today and I think I am about to break my PC. This issue becomes more challenging than learning VBA. Please restore my sanity.

Jeff!
For some unknown reason to me, the project explorer keep undocking itself. I have tried it hundreds times, some how I have now the normal window back. It may be by pure chance I have got it back. I am now terrified touching any screen on VBE window. Thanks for your help!