pietzcker is correct. I thought I was being clever and disabling the third frame altogether, but what I realized I was doing later was just changing the mode to binary, which indirectly disables the third frame in the context menu.
I am going to go back to using Beyond Compare until this UC context menu thing is straightened out.
In BC, you can highlight two files and with one context menu click, compare them. This is what I am doing 99% of the time...actually, 100% of the time as I've not yet compared 3 different files, and I constantly do text compares every day.
We really need to be able to do that, plus disable the third frame in the context menu if we want.
Hopefully these types of things can be done in UC soon. I've bought the product, but I think I've bought BC too, and right now I've got to use that due to this context menu thing.
I'd love to come back to UC soon, so please tweak the context menu behavior!