To install an extension, simply double-click the
.roboFontExt file included in the package. A dialog will appear, asking you to confirm the operation. (If the extension was already installed, you can choose to re-install it.)
And that’s it! The extension is installed and ready to be used.
To uninstall an extension, go to the Preferences window. Under Extensions, select the extension which you would like to uninstall, and click the minus button at the bottom left of the window.