Oh, you're very welcome.  And I'm so sorry to hear about your health.  I hope you get better soon, and that you manage to avoid another stay in the hospital.  This is an awful time of year to be away from home.

I'm not all sure what you mean?  I've never had windows do anything I'd call sliding, nor ever had to "go into" the UV editor,  so I'm not sure what behavior you're describing.  Maybe if you could describe what's happening in more detail? 

I generally have a "window" open for the Image/UV editor, but it's just kind of there.  UV mapping is actually done in the 3d view.  The UV editor only comes into play after a UV map exists.  To UV map something, I select an object in the 3d view, go into edit mode, mark where the seams should go, select all the faces I want to map, and then UV map them.  After that, if I select all the faces I want to edit the mapping of, I can see those faces in the UV editor and change them if I want. 

Which part of that process isn't working for you?   If you just can't switch to Image/UV editor at all, then there's a major problem with your copy of Blender.    Which definitely might be true if you're losing access to your File menu.