In addition to the other currencies recently added, you can now use PayPal to add Airspace Credit to your Leap Motion Account. This will let you purchase apps from the Airspace Store by adding credit to your account.
If you previously had a debit card or credit card that wasn't working, please give PayPal a try.
Here's what that looks like:
Please note that Paypal is not available in South Korea or China.
Try it out: