Oliver,
When your subscription expires, your access to the download area expires as well. That's made very clear when you initially subscribed. Also, there are automated emails that are sent one week, and the day of your expiration to let you know how long you have until your expiration. Additionally, if you re-subscribe while your subscription is still active, you get 10% off the new subscription price automatically.
Unfortunately, there's no way for us to get you the Joomla 1.7 version of JFBConnect. Since your subscription expired, we released version 4.1, with over 60 improvements and new features, and we are recommending all users to upgrade. The version you would have been able to download would have been 4.0.3, which is no longer available at all. The new version also has some enhancements for the upcoming Joomla 2.5 version, coming out this month, that aren't available in JFBConnect v4.0.
If you'd like to read more about v4.1 and it's new features, the following links should help:
JFBConnect v4.1 Blog Announcement
JFBConnect v4.1 Changelog
Thanks,
Alex