Plugins are subscribed or acquired on a per-app basis. When acquired the license is perpetual for the given app, when subscribed the license is valid as long as the subscription is paid for.
When a plugin is subscribed, the fee is added to the monthly bill (or yearly if the user is on a yearly plan), and the amount is prorated. If you subscribe to a plugin for one day you’ll end up being charged for this plugin fee / 31. The regular app subscription invoice will show the detail.
In order to unsubscribe from a plugin in the Bubble application:
Go to your editor application https://bubble.io/page?type=page&name=pagename&id=applicationname&tab=tabs-6&subtab=Plan
Access settings Tab
Go to App plan subtab
Find the last section Paid Plugins
Under this section you'll find the list of plugins which you've subscribe to and or paid
Click Unsubscribe from the plugin you wish to cancel the subscription
7. That's it.