Riffworks Line 6 Edition has been discontinued because the commercially available versions of Riffworks are now Line 6 compatible. There is the T4 version (free), the Standard version (not free) and a deep discount offer for the Standard version for previous Line 6 Edition owners.

Here are the relevant links:

http://www.sonomawireworks.com/T4/

http://www.sonomawireworks.com/store/index.php?main_page=product_info&products_id=10

http://www.sonomawireworks.com/guide/index.php/Riffworks_Crossgrade