Please ensure that you are logging into an Impulse account that is associated with the same email address that you used to purchase Fences Pro. Fences Pro can be downloaded from under the "My Software" tab in Impulse. If Fences Pro is not listed, try closing Impulse and running the following file:

http://sd.stardock.com/curthendzell/fix_registrations.reg

Make sure to follow the link in Internet Explorer, as other web browsers will not handle the file type correctly.  Once you follow the link, save the file and double click it to apply it.  Then relaunch Impulse.  You will need to re-login with your username/e-mail (either will work) and password.