Setting windows scaling to 100% is what fixed this for me
This mod is a Godsent. I am finally able to play KOTOR 1 for the 1st time because I never got it working properly on a 4K TV. Now the game looks amazing together with a texture mod. Thank you.
I found 1 bug though so far, in my 15 hours: the Scripts menu is empty for all characters, it looks like this: https://imgur.com/70Ekx9O