Running Pianoteq from PI4 usb?

I have a PI4 with registered Pianoteq installed which is low on sdcard space. I want to gradually transition to running PI4 from a usb stick with more space. PIOS is installed on the sdcard and on the usb stick. I copied the Music folder from the sdcard to the usb stick.
The problem is if I try to run Ptq after booting from the usb stick it asks for activation. Since I did not activate, Ptq runs fine when run without booting from usb. What are the implications of activating from the usb? Say in the future, I eventually get a larger new sdcard can Ptq be moved to it?