This information applies to versions 4 and newer
Tablets are not officially supported for use with Nik Collection.
However, we have received feedback from some users with Wacom tablets who have advised that their devices worked after the individual Nik Collection programs were added to the properties of the Wacom drivers.
Here is an example of Silver Efex:
At the top of the Wacom Driver Properties dialog box, you need to select the Nik program BEFORE disabling the Windows Ink button. Silver Efex must be OPENED for this purpose. Once Silver Efex is open, you can add it to the options at the top with this little plus sign. Once selected, UNCHECK the Windows Ink option and it normally works.
The key is that the Nik application must first be entered into the properties of the driver.