Why won't the STU SDK work with my DTU/DTH/DTK tablet?

The STU SDK can only be used with STU pads. As at time of writing (July 2018) these are the STU 300, 430, 500, 520, 530, 540 and 541.
It is available on the following platforms:

• Windows 10 or higher
• Linux
• MAC OS 10

Please note that there is no browser support on Linux or MAC OSX.
For details about the low-level API for DTU devices please see the Wacom Device Kit.