Hoiw To Save Dds Files

Hello
I've been trying to edit some UI elements (mainly changing UI colors). I extract dds file froma dat file.
I open it in photoshop, edit it and save. But when I load the game it seems like my modified dds files don't display correctly.
I propably have to save dds file differently but I don't know what settings I should use. For example what Save format should I use (DXT3, DXT1. Should I generate MIP maps or not? There are a lot of additional options like Dither Color, Normalize MIP Maps etc anything should be selected?) Anybody could help with that?

Thanks for any help you can provide.

Nevermind. I found out I have to save it as DXT1 (1 bit alpha) and it looks fine in game. :)

Keep in mind they often update the the UI file so you'll have to update any changes on the newer file if they update it.