On your home screen click on the member benefits link on the right side of the lower section of the screen.
Sent from my mobile device... Please excuse typos.
Bruce's advice assumes you have purchased a Developer Subscription and not a freebie community user. If you're paid, then you get a developer version that has limited connectivity. I think it is something like 3 or 5 users connected maximum. It is useful for testing purposes in particular before pushing something to a production server. If you have a production database, you should get a regular license. If the link is not available to you as a member benefit, then you need to renew your Developer Subscription. Its a great program to get an inexpensive server software for testing and development.