How to install a special theme in Godot Editor

Godot Version

Godot 3+ , Godot 4.2.2


I want to install a special theme in Godot, it is special in that it changes not only colors but also textures, I use this theme - GitHub - violinbg/godot-desktop-themes: Godot themes aimed at desktop applications

In this theme, all the textures are in the project folder so that the theme can detect them, but when I open another project where these textures are not present, the theme breaks and looks wrong, where should I put these textures so that the editor can always detect them?

Theme with textures in the project:

Theme, no textures in the project: