
Both ship as a VST3 and run in any DAW that loads one. They unlock through the FL Connect app, so there is no second licence to keep track of and nothing extra to pay.
Download the plugin and put it in your VST3 folder. On Windows that is Program Files, Common Files, VST3.
In FL Studio: Options, Manage plugins, Find plugins. Other hosts scan on the next start.
The plugins unlock through the app. Have it open and signed in, and that is the whole of it.