VAG EEPROM Programmer 1.20 is a specialized diagnostic and programming tool used primarily for older Volkswagen Group vehicles (VW, Audi, SEAT, Škoda) typically from the 1997–2003

The "1.20" designation refers to a specific, highly stable version of the software that became popular around 2010-2015. It is widely regarded as the last version before developers moved to more commercial, licensed models.

If you want, I can:

Supported Hardware Interfaces

• USB-to-serial/TTL interfaces (FTDI, CP2102) for TTL-level connections.
• Dedicated EEPROM programmers (e.g., CH341A, TL866 family) via plugin/exported dumps.
• Clip tools (SOIC8 test clips) for in-circuit reading of EEPROMs.
• ISP connectors for microcontrollers and EEPROMs with SPI/I2C/3-wire protocols.
• OBD-II adapters only if the software explicitly supports ECU flashing via CAN/K-Line (not all versions do); when supported, requires appropriate interface (e.g., ELM327 is usually insufficient).

Configure: Open the software, go to Options, and select the correct COM port (usually COM1 through COM4).