There are 3 stages:

• TCU software update
• TCU maps update
• XDF and ADX files in Tuner Pro

TCU software update

• Download latest firmware from Download section
  • Unpack zip archive
• Connect to TCU (make sure that Tuner Pro is turned off)
• Run TCU UpdateSoft.exe
  • Select .tcubin file
  • Click Process and wait for it to finish