While prosecution is rare for individual users, it is possible. Software piracy is a violation of the Digital Millennium Copyright Act (DMCA). Horizon Hobby, the parent company of RealFlight, actively monitors torrent sites and issues takedown notices. If you use a cracked serial number on a PC that connects to an RC club’s network or a workplace computer, you expose yourself to liability.

A serial number (or product key) for RealFlight 9.5 is a unique alphanumeric code—typically 20 to 25 characters long—that acts as a digital handshake. When you install the software, the installer checks this key against an algorithm or an online server to verify that you have purchased a legitimate copy.

: Launch the RealFlight 9.5 Launcher. Enter your serial number exactly as it appears. If your PC is connected to the internet, it should activate automatically.

Look for a sticker on the back of the DVD case or on the printed quick-start guide included in the box. Digital Purchase:

: Typically found on the back of the DVD case or a printed insert inside the box.

If you've purchased RealFlight 9.5, you can find the serial number in one of the following places:

RealFlight 9.5 Serial Number: Ultimate Guide to Activation and Recovery

If you own RealFlight 9 or 9.5, you can exchange your serial number for a to update to RealFlight 9.5S for free.

If you bought it directly from a hobby retailer (prior to the Steam-only transition), the code was sent to the email address used during checkout. Upgrading to RealFlight 9.5S

: If the software asks for a controller serial, this is located on a sticker on the rear of the InterLink DX controller or transmitter interface itself. How to Activate Your Software