If you already have FL Studio 20.5 or higher (or FL Studio 2024/2025), . You do not need to hunt for an external download link.
FLEX is a in FL Studio and does not require a separate download if you are running FL Studio 20.2 or higher . It is included for free with all editions, including the Fruity Edition. 1. How to "Download" and Access FLEX flex plugin fl studio download