WP eStore plugin help!! Not generating product links

Hello all,
Okay, so I am having trouble with testing out the shopping cart and generating product links on my website.
The site is at https://www.rerdownloads.com and is a download product site (music)

I am trying to carry out a test transaction – the customer (me) buys an Mp3 then makes payment via paypal.
Now, this should then generate a product link which takes me to the location of the file on the server.. but its not. It is just not working. I tried configuring the options of the plug-in to send an encrypted link to an email address – however there is no link in the email.
Also I ticked an option to display a link to the product on a Thank You page, however this also does not seem to work.

Am at my wits end as to what the problem could be. I am not even sure if I have a demo or a premium version of WP eStore…my plug-in is activated..I have made a couple of thousand products with IDs etc. I dont know why it would let me do all this if it was only a demo.??

I would be extremely grateful if anyone could help me out here…
thanks
Henry