I've updated a few minor bugs, one being where you would have AutoUpdate on for the brush re-colouring and then Undo, it would affect the current brush. Now it deactivates that mode when undoing/redoing.

Made it so that the active colour switches back to the brush base colour after some inactivity with the sky colour to avoid accidently changing the sky colour later as you are more likely to want to edit brush colours.

If you have issues allocating the custom brush folder for whatever reason, you can go into :C:\Users\username\AppData\Local\BackdropDesigner_(version)
and open the paths.txt file. Paste the path you want to use in there and save, then restart Backdrop Designer.

Example: F:/BackdropDesigner/CUSTOM_BRUSHES/      (make sure the folder exists)