Folder Icons, replace all yellow ones for blue ones

[abr]

You can do that using Regedit. Like Leo describes in following post.

Change the default folder icon in Opus

[If you want to change only particular folder icons or folder label colors see Color Folder Icons and Set Folder Colors via Context Menu.] Directory Opus gets the default folder icon by asking Windows via a standard API. Directory Opus 9.0.0.5 and …