fenathesnake

You're right! I have "X-Mouse Button Control" installed to customize my extra mouse buttons. I closed it, and now can't scroll disabled values. After some researches, I found this option: Seems like this option allows to change disabled values with Scroll Lock ON. I didn't even knew it can do that! Anyways, it means it's not paint.net fault, so I think problem is resolved.

Hmm. For me it works every time on Paint.net 4.1.4 and 4.3.4. Also, I found that scrolling the mouse wheel on the values (like in GIF) is safe, but scrolling the mouse wheel on the sliders themselves immediately crashes the program. Here is the crash log, can this help?

How to reproduce: 1. Create or open any image 2. Save as "anyname.png" 3. A window with saving options popped up 4. Find out you can't change disabled (grayed out) values 5. Find out you actually can change the disabled (grayed out) values by scrolling mouse wheel over them. This can cause a crash, so be careful when testing.