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Using same plugins to another bubble app

I bought a plugin for my first app and want to use it for my second app but plugins are on a per-app basis. It cost $50 to pay at once, but I’ll like to buy it on a monthly basis cuz this app I’m making is just a prototype. What actions should I make that would benefit me most, that I could save if this app I’m making will not go to the live server?
thanks for the help.