You will not be able to, you will need to purchase a Terminal Server License (TSL). TSL license code (serial number) can activate the programs on terminal server or in remote desktop environment.
Gaaiho PDF Suite, Converter TSL have passed tests on Windows 2008 and above systems and compatible with Citrix environment.
Important: Gaaiho PDF "Perpetual" license DO NOT support terminal server nor remote desktop environment. For more information please refer to: Remote Desktop and Enterprise Licensing Programs