Hello,
Usually when you login to StackIdeas.com you should see the Dashboard menu item top right next to your username.
Click the Dashboard menu, and your Dashboard should list the extensions you have purchased.
My Purchases: EasySocial should be listed if you paid for it.
Hope this helps until Mark or someone from StackIdeas answers your question. Someone usually answers right away, even on weekends. Keep in mind if you are located in North America, the StackIdeas team are located in Malaysia, and it is 11:35 AM Sunday there time.
You can also contact SI at
http://stackideas.com/contact-us