Product Download / FILE URL Issue - Marketpress

I have a problem with my marketpress. I created a product and I uploaded the product file and it looks good on my side... The issue is when customers purchase the file... The product url/file is copying the permalink of the product.

For example.

Product URL is: http://URL.com/shop/products/stripe-ui/

Product Download/File URL:
http://URL.com/wp/wp-content/uploads/2012/09/Stripe-UI-iOS.zip

When customer purchase the product they are downloading:
http://URL.com/shop/products/stripe-ui/?orderid=1461cd9dd8f3

Which is suppose to download:
http://URL.com/word/wp-content/uploads/2012/09/Stripe-UI-iOS.zip

But ends up downloading a file with the product title:
stripe-ui.zip

File that doesn't exist...

I thought it had something to do with my marketpress being outdated so I spent $19 to upgrade it only to find out that it has the same problem...

I realized that when downloading the file url it replaces the original zip file with the title of the product. Is there anyway to change that?