We just released ProtectUSB Content version 18.104.22.1685. This new version comes with hardware write protection support for USB sticks based on recent Alcor controllers.
This means you can now use the hardware write protection option for USB sticks based on Alcor and Phison controllers. For USB sticks with other controllers or older models, you can use the software based write protection.
Both hardware based and software based write protection are optional features to prevent users from changing data on the protected USB sticks.