For Linux Debian (Ubuntu) uninstall plese follow the following steps:
To uninstall the MA9 single touch driver, locate the program in the Ubuntu Software Center.
Navigate to the Ubuntu Software Center click "Installed" and then "Show X technical items".
Use the search box to search for "touchfoil".
Click on "Touchfoildriver-MA9" then "More Info" and click "Remove" to uninstall.
When the system asks for authentication, please enter your password.
Note: To unistall the driver from the terminal: