The method described in the beginning of this thread is still possible but is not the way to go with the latest Vario (for a least a year now, not sure if it is applicable to yours); it might shift the calibration way too much inadvertently.
You should have with your grinder an hexagonal key ending with a strange looking metal blurb. It fits into a small hole located near the chute.
Your manual may not be up to date (mine wasn't) to describe the calibration procedure. You can find the latest version of the manual here on
Baratza website (PDF) (the maker of the Baratza Vario / Malkönig Vario Home). See page 8 for calibration.