Holeshot,

Next time turn the adjusting wheel (dented) back to the zero position.
This wheel becomes accesible through one of the holes of the wheelbolts
as you align this 45° above the horizontal axes towards the rear. You'll need a flat screwdriver of 4,5 mm. Turn up on the left wheel, down for the right.
And don't forget to readjust after reinstalling!
Doing so it will be possible for the brake shoes to retract.

Danny