you must uninstall the trial version before downloading and installing the Fullversion. also you need to log in to impulse with the same email used to purcase WB.

open impulse, click on the far left tab, select "change login" add your login info (Email addy and password) and apply, this sould allow you to download the latest items you have purchased in the "software" tab

Ok it might be a registration issue, I would fire off a support ticket to Stardock, they should get it handled asap. Also try right clicking on the ? on the top right and select " look up serial unmber and enter your email address in the popup box. they will then send you all serial unmbers, then Click the "register Product" button below the? enter the info requested and it should allow acces to the download in Software tab.