If you are looking for a legitimate, free way to start using FluidSIM 6, I recommend checking with your educational institution's software licensing department for access to the Academic Version.
Are you trying to access FluidSim for or commercial work ? fluidsim 6 ticket number free
It is not naturally "free"; it is a digital key provided specifically to customers after they purchase the software from Festo Didactic Art Systems Software GmbH How the Ticket System Works Digital Delivery If you are looking for a legitimate, free
Cons
Are you trying to simulate , hydraulics , or electrical circuits ? it is completely legal and safe.
Festo offers a free trial/demo version directly on their website. While it has limitations, it is completely legal and safe.