| Action | What to do | |--------|------------| | | Click Refresh . The dongle should appear as “VCDS‑Kolimer (VID:PID …)” . | | Backup (optional) | Click Read EEPROM → Choose a folder → Save eeprom_backup_YYYYMMDD.bin . | | Load firmware | Click Browse , pick the .hex file. | | Flash | Press Write Firmware . A progress bar will show the upload. Do not unplug the dongle. | | Verify | After flashing, click Verify (or the loader will auto‑verify). A “PASS” means the CRC matches. | | Reset | If you enabled “Auto‑Reset”, the loader will cycle the dongle; otherwise click Reset or unplug‑replug. | | Done | Close the UI. Your dongle is ready for VCDS. |