While you wait for answers, we may have found some information which could help you.
Click here for Blind Repair HelpStuck (open) Velux window?
Where can I purchase Velux Kem-140 motors?
Where can I purchase a new Velux Scissor Operator for my Velux Skylight? ?
My VELUX remote won't work - how can I repair it?
Where can I Purchase a Velux Kem-140 Skylight motor?
Scissor Lift?