3D FlipBook - License for staging site

Good day, We recently purchased a 3D FlipBook license and applied it to our school main domain website https://bayside.qld.edu.au. We are now developing a new website on https://staging.bayside.qld.edu.au to replace the current website. I installed the 3D FlipBook plugin on the staging installation, but it won't let me use my activation key with a "License Already Activated" message. I have other plugins that recognise staging sites based on the main domain and allow multiple activations.

Is it possible to activate your plugin without purchasing another license?

Thank you and regards, Paul