UV Image Editor won't allow me to search for textures I have a 3D tea cup model that I've loaded into Blender v2.78 and I'm trying to access its 2D texture so I can play around with the texture and make some changes to it.

So I had a similar question to this one and I'm struggling to follow the accepted answer because of what I'm seeing in Blender.

When I open that BLEND file in Blender I see:



I've confirmed that the top window is the UV Editor. When I click on the "Icon with a photo" (which is instruction #3 in the accepted answer to that other question, I'm trying to "search for textures", but as you can see it will only allow me to choose View, Paint or Mask:



All I'm trying to do is to extract out the texture to this tea cup, any ideas what my next step should be?



Update

I selected UV Editing layout and see this:



So the options I'm seeing are:


Render Results
Viewer Node
Alexs_Apt_8k.jpg
wooden_fence_texture.jpg


None of these seem applicable to my tea cup!!! Again, I'm just trying to get the 2D texture image of the tea cup model that I see in the Camera Persp screen below the UV Editing window.
Your very top editor is the uv image editor, but to use it you need to drag that whole bar down to see the window - what you think is the uv image editor is actually a node editor, and below that is the 3d view and then the timeline. 

Use ctrl-left/right arrow to get to the UV Editor layout, and then use the button next to the 'New' button to browse that available images in the file - if there is an image texture in the cup's material, then it shoudl be available to open.
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edit: your material for the cup doesn't have an image node hooked up, and there isn't an image to go on the cup material in the file. Looks like you need to add an image node and then open the image you say you have in the mtl file, or go back to blender render and try to import the object with the mtl intact to get the image in the material.
Image as reference for the UV Image Editor]1]1