Here is the official download link for (currently maintained as part of the AURIX™ Development Studio or as a standalone tool for older controllers):
Recommendation:
Users should always download the latest version (currently Memtool 4.x) to ensure compatibility with the newest Windows versions and microcontroller families. infineon memtool download link
9) Where to find additional resources
Connect your Infineon device or programmer via USB.
Launch MEMTool.
In MEMTool, select the appropriate target device or interface from menus.
Load firmware or memory image using File → Open (or the provided UI elements).
Use the tool’s “Read”, “Write/Program”, “Verify” functions as needed — follow device-specific programming sequences from Infineon application notes.