Highlighting them then pressing DEL doesn't work, there is not RMB drop down menu when you click on them, there is no button in the tools' window that specifies delete. I don't know what you mean by "directory" you ad brushes in brushes mini window on the right of the tool.....If by directory you mean the folder where I have my brushes, it doesn't matter if I delete them from there.... I looked in program files for brushes, or a link to where "brushes mini" is caching but I can't find it.