You may install ClearBox Server, as an any Windows-based product, via Windows Control Panel. If you don't need the instructions on how to do it, you may skip that part and jump to the next describing how to remove some specific files and certificates manually only.
The process is described on the example of Windows 2012.
Click the "Start" button and then click "Control Panel":
When the Control Panel window brings up, select "Uninstall a program":
Select ClearBox Server in the applications list and click 'Uninstall" (actual product name and version may vary):
The rest of the process is straightforward. After confirming the removal of the application, please follow the steps for “How to remove log files”.
After ClearBox server is removed from the system, some log files may remain on the disk. If you don't need them any more, locate this folder in Explorer and remove it: c:\Program Files(x86)\ClearBox Server.