The withdrawal page is in the "Funding Options" -> "Withdraw Funds" page.

The regular International Wire withdrawals are not processed at the moment. If you want to have your USD on your bank account you need to contact support and ask for the emergency international wire withdrawal with 5% extra fee. This emergency withdrawal has a queue of about 4 weeks.

The withdrawal methods that do work are:
- domestic Japanese wire (delay of about 2 days)
- domestic Polish wire (delay unknown)
- Euro area SEPA transfer (delay about 4 to 5 weeks)

This is all hearsay by the way, the only withdrawal method that I've used is the SEPA one.