Because Aerosoft has removed the direct FSX links from their main storefront (redirecting to MSFS instead), finding the correct updated installer is tricky.
Do not use the original DVD or early digital download (v1.0). You need the cumulative updater. aerosoft crj fsx updated
For FSX users, this remains the CRJ’s strongest selling point. Because Aerosoft has removed the direct FSX links
When Aerosoft released the CRJ 700/900 X for FSX nearly a decade ago, it was a paradigm shift. Before this, complex airliners were resource hogs. The CRJ introduced the CRJ Display System (CDS) —a fully functional, frame-rate-friendly glass cockpit that mimicked the real Bombardier (now Mitsubishi) jet. For FSX users, this remains the CRJ’s strongest
For FSX users, the CRJ was a savior. It offered deep systems—including a fully modeled FMS, VNAV, and realistic fuel planning—without melting your CPU. Over the years, users reported bugs like the dreaded "autopilot oscillation" and "RMP (Radio Management Panel) freezes."
That brings us to the final update, officially designated Version 1.2.5.0 (and subsequent hotfix 1.2.5.1).
Because this is the last update, some bugs are permanent.