Making eraser switch to a simple left click button

[soocheolc13158380]

Hi, I like using my eraser switch(the back side of my stylus) as a brush when I don't need detailed brushing for tip durability and all.

I've been using it like that for years, but the recent Photoshop update changed things.

I know it's in Korean, but it says "left click"

In Wacom preference, it is still a "left click", and it does work as a left click.

But as soon as I put my stylus on my tablet, Photoshop automatically changes and locks the tool to the eraser.

Like this:

Does anyone know how to make Photoshop not do that?

Thanks!

(I'm using Wacom Cintiq Pro 24)