The Option Menu for the Shader Mixer pane can be accessed by left clicking on the pane_options_button while it is the active Pane in the Pane (Tab) Group, or by right clicking on the Shader Mixer label of the tab that is attached to the Pane (Tab). Below is a list of each Action that is in the menu, by default.

• Refresh Custom Bricks
• Browse to Custom Bricks location...