If you truly want the Aerosoft CRJ experience (and you should, it is fantastic), stop searching for "free" and start searching for "sale."

If you search for "Project Airbus CRJ 700 FSX" instead of Aerosoft, you will find a legitimate, fully free model. It does not have the "study level" systems of the Aerosoft version, but it includes:

Why choose this? It is legal, virus-free, and available on trusted sites like Flightsim.com or AVSIM.

If you want a regional jet experience without spending money, you have two honorable paths: