In your VCDS folder, look for:

If missing, restore from a trusted archive.

Kolimer often writes temporary keys to the Windows Registry. If you are not running the loader as Administrator, or if your user account lacks permissions to the HKLM\SOFTWARE\Ross-Tech key, the loader cannot complete its patch sequence.

VCDS by Ross-Tech is the industry-standard diagnostic software for Volkswagen, Audi, Seat, and Skoda vehicles.