The portable UVK packages install UVK the same way the setup does. They just do it silently, and don't create a system restore point, resulting in a super fast installation.
However, you will still need to uninstall UVK from the Add / Remove programs control panel after using it.
So, you can use this simple script to quickly uninstall UVK after using it. Just download and save the script, and run it after using the application.
UVK will be fully uninstalled.
Uninstall the application.