Enable sensors used for displaying the core temperatures selecting them, starting with 'Sensor 24' (with decreasing sensor numbers for additional cores), from the 'MBM 5 sensor' dropdown and then setting 'Should display board sensor' dropdown to 'Custom'. Remember, starting with version 1.1: Core 0 is Sensor 24, Core 1 is Sensor 23, Core 2 (if detected) is Sensor 22, etc. all the way down to Sensor 9 for Core 16 (again, if detected).