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: If the software fails to recognize the file, ensure it hasn't been renamed and is not blocked by antivirus software.

If you have a legitimate Gun4IR (whether DIY or pre-built), follow these steps to get your license file.

The year 2021 was pivotal for the project as it matured from an experimental enthusiast tool into a more stable, widely adopted platform. Key aspects of the license include: Personal Use Only:

The license—specifically for the system's Graphical User Interface (GUI)—is required to flash the necessary firmware onto your lightgun's Arduino and calibrate the 4-point infrared tracking system.

If you purchased a license in 2021 and cannot find the file:

If you landed on this article, you likely fall into one of three categories:

: By 2021, the system had moved past early versions (like v2.16) to more unified firmware packages that included features like RGB LED autodetection and improved IR "blob" filtering for better tracking accuracy. The Role of the License File