Here is to download the FDTool software for free: FDTool 3.0 (https://cdn.shopify.com/s/files/1/0520/9096/2073/files/Archive.zip?v=1633728382) .
Our Ultrasonic Flaw Detector PC Tools (FDTools) is free to all. The downloadable package includes the software itself (FDTool.exe), "how to" file, and a USB driver in case your USB port is old and without the driver the FDTool needs to connect the Flaw Detector to your computer.