With ZBrush and other 3-D applications, removing the check for using Windows Ink will get your Right-click working how you need it to.
You will need to first add ZBrush to the Application row. The below link will walk you through that process.
Once you have added ZBrush to the application row, select the icon so the Yellow bar is under the zBrush icon. Then in the lower section, un-check the Windows Ink box. As shown below.
 The image to the right shows Windows Ink as being unchecked. This will only affect ZBrush.