After becoming a sponsor you can validate your copy of Diffractor using the Options screen. Click on the Options menu to get started.
On the options dialog, enter your sponsorship email address. When you click the verify button, Diffractor will connect via the internet to confirm your email address. A message will be shown confirming everything went ok (or not).
As a sponsor, you can enter additional folders to index. This is done also on the options screen under Indexing.