Simple as:
Head to your 'My Account' page (click your profile picture on the web)
Select withdraw then bang in some account details when ready
Choose the amount you want to withdraw and boom you are done!
How long does a withdrawal take?
It can be as quick as 24 hours or as slow as 5 days... depending on the banks, of course.
I can't withdraw, why?
You must be fully verified on our system before being able to withdraw -- this is a government regulation/
Note: due to the Anti-Money Laundering Act, you have to turn over your money once before being able to withdraw it.