C-Pen 20 + 3.0:
How to make a clean reinstall of C-PEN Core
To make a clean re-install of C-PEN Core software, these steps are required:
Note that AppData folder may be hidden. See Microsoft support about how to make it visible.
C-PEN TS1 / 20 / 3.0 / 3.5 user guide (Windows)
These user guides apply also for C-PEN 20 / 3.0 /3.5