Downloadable product variations, any solution?

Hi,

my downloadable product has variations such as single and multiple use license. Unfortunatly, the plugin wont let me add those. That means that I would have to duplicate the same product with different price... but that brings duplicate content issues and thats tottaly unconvinient.

How do you guys handle such case, is there any way to manage digital product variations? I really dont want to duplicate products for just choosing the license type...

thank you.