I don't know what UW is, but the window should resize fine at any resolution or UI zoom level. not sure what is up. I personally test it on a 1080p monitor with 100% zoom
UW means ultra wide 21:9 ratio normally. The mod settings don't work at all, but the drag and drop from the lower right corner is working so all good.
I guess another work around would be to lower the UI zoom level in game's options.
Do you have an history of chests becoming bugged while using this mod? I saw a few reddit posts about people who tested their mods and found this one to be causing the chest bug.
In my current world I am playing with my bro, we activate magic storage after the world was build, and I believe because of that and the interaction with recipe browser all the chests in the world are now broken. You have a great helpful mod here, but can you please tweak it a little so it doesn't break chests at all, either when reloading mods or interacting with others? There's no reason at all this mod should be affecting chests in any way.