Because when I try to edit my brushes it defaults to a blank window, I will often save over my brush with the new settings as well as overwriting the icon with pure white. I've looked around and I can't find any solutions for getting just the icons back to their normal state.
I know that this isn't a huge deal, but I quite like the default icons and I am wondering if there is any way to recover them.

Krita never overrides or delete anything.
When you override a brush preset, Krita will create a backup with the same filename plus some weird numbers on the end of the name.
You can change the filename extension of both, the preset and the backup from *.kpp to *.png.
Open both, on Krita.
Copy the content from the backup and paste it on the preset.
Save the preset.
Rename both back to *.kpp

Unfortunately there is no way to do this from the BrushEditor interface. it needs to be made by hand.
I don't know if there are plans from the developers to change that, but it would be good if at least the icon loaded by default on the scratchpad.

On Windows, the presets are saved to C:\Users\[Username]\AppData\Roaming\krita\paintoppresets
On Linux, they are saved to /home/[Username]/.local/share/krita/paintoppresets/

ok. I've been editing the .kpp files in this directory to fix them as best I could in the past. To clarify are you saying that the original gets saved as the file with the random 6 (I think its 6) digits/letters at the end?

RAF74_HAWK wrote:ok. I've been editing the .kpp files in this directory to fix them as best I could in the past. To clarify are you saying that the original gets saved as the file with the random 6 (I think its 6) digits/letters at the end?

Yes. Krita always make a backup of the preset whit the same file name plus the 6 digits.
I'm not sure if the backup is the one with or without the digits. But I'm sure there is a backup.