All FL Studio Editions are fixed in the included features / plugins and in the price you pay for them.
Upgrading from one Edition to a higher Edition, you pay the difference in price.
Earlier purchased and owned separate plugins do NOT deducted from FL Studio upgrade prices.
Upgrades prices between different FL Studio Editions are fixed, independent of earlier plugins bought.
Many plugins had two modes of operation, each with a different license:
1. FL plugin version - Works only in FL Studio
2. VST/AU plugin version - Works in all VST/AU hosts (outdated format and no longer supported)