It is available. Here's what you have to do:
1. Login to the site. Since you posted to the forum, I guess you have already figured out that in order to login you have to use that tiny button on the upper left. I added a more obvious login box in the downloads page as I received many complaints. Total UX failure on my part. I apologize.
2. Go to the Downloads page and click on the Admin Tools category.
3. Click on the latest release, i.e. 1.0.a1 at the time of this writing.
4. You should see a Core and a Professional download. You should be able to download the Professional version.
Do note that PayPal was giving us fits, failing to send the payment notifications. Some subscriptions took an awful lot of time until they were manually activated by yours truly. We apologize for the inconvenience.
Nicholas K. Dionysopoulos
Lead Developer and Director
🇬🇷Greek: native 🇬🇧English: excellent 🇫🇷French: basic • 🕐 My time zone is Europe / Athens
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!