1. Verify that the URL you have specified in the "Digital Content URL" field is not resulting in a 404 error (meaning there is a type in the URL). You can check this by copying and pasting the true URL into your browser and seeing if the file downloads properly.
Checked and I can download the link directly
2. Please delete the following two files ".htaccess", ".htpasswd " from the downloads directory of the eStore plugin and try the download again.
Deleted still not working
3. Please Make sure that you do not have any spaces in the file name of your downloadable file. It is okay to have spaces in the file name on your PC (e.g. My eBook.zip) but remember when you upload it on the server it becomes a URL and a proper URL should not have spaces.
No space and still not working
this is the link that I get after purchase
http://adviceinloverelationship.com/wp-content/plugins/wp-cart-for-digital-products/download.php?file=3hOa%2FS0LV%2F2XjKjvyUyZ9OKTRg%3D%3D
I am using version 3.8.4 of the plugin and Version 3.0 of WordPress