Recent versions of wings I've found to be unstable. And older versions just don't work as well on a win 10 machine (I used to be a mac user). They also botched circularize to where it's barely usable compared to the way it used to be. There's a bunch of things. Admittedly Wings always was a little crashy with the UV editor, especially if you make sudden moves or are impatient with an unwrap, and really dense meshes. I always try to map at the lowest subdivision level for something and then process the maps a bit after the final subdivision level to fix introduced artifacts, usually an optimize stretching helps to relax after a subdivision of an existing UV. Wings performs much better with that workflow. I still use it primarily, for simple things, because I'm so much faster than in Blender, although at this point Blender surpasses it (especially with add ons) by miles.

Good luck.