To select different measurement modes and to calibrate the ColorMunki it is necessary to turn the rotary disk. To do so grasp the instrument and turn the disk by the outside edges.
If you are having an issue where you see the check mark turn green indicating that the instrument has been calibrated but as you turn the rotary dial it goes back to red showing that the instrument is not calibrated this is being caused by the center dial being depressed and forcing the device back into a calibration. You may not even be aware that you are doing this and it can happen quite easily.
The best way to avoid this is to use the nub of your fingers around the outer edge of the dial. This will prevent the rotary dial from being depressed and therefore allow you to move to the next step in the software. If these steps are all performed correctly you will see all 3 boxes are now in a green check mark status and the right arrow at the bottom of the page now becomes selectable.