I've just updated to the Jun 2018 version and Paintstorm no longer accepts brush motion from my Wacom Intuos Pro (on Mac).
The Wacom still works fine for all other drawing programs and worked perfectly for the previous and prior versions of Paintstorm.
Express buttons on the Wacom tablet still work normally in Paintstorm. Side buttons on the Wacom pen toggle normally too. It just doesn't respond to pen movement.
This happened exactly when the new version of the program was installed.
June 2018 update: No longer responds to Wacom pen
Re: June 2018 update: No longer responds to Wacom pen
Try to re-download and reinstall, we've fixed some hot bug with MAC+tablet lags
Re: June 2018 update: No longer responds to Wacom pen
Yes, this latest version tweak fixed the issue, thanks.