Here's an image of the window I mean. When opening a .data file, it asks for dimensions of the image (as this type of file has no image header, and so the program cannot tell its height and width). This is the tallest it goes, and I have it slightly less wide than maximum to illustrate it's a separate window
I don't have any plugins installed that you don't get by default.
I don't have any plugins installed that you don't get by default.