JUser BestBefore Business Edition for Jooma! 1.6, 1.7 and 2.5
For personal and business websites. Limited support.
Current version: 2.10.0
Purchase includes one (1) year free updates.

A component is available which allows you to re-activate user accounts that have been disabled by the plug-in. You can get it here (screenshot).
The component is not a stand-alone extension. It can only be used in combination with this plug-in.

A plug-in that automatically converts, disables or removes user accounts that have existed for longer than the configured period or have reached the configured maximum number of log-ins. In other words: With a configured period of 1 year, all user accounts older than 1 year will be disabled or removed from the Joomla! database, irrespective of whether these users have been active or not.
The plug-in can also be configured to:
- disable/remove a user account upon first log-in of the user;
- disable a user account that has reached a maximum number of log-ins;
- convert user accounts to type 'registered' after a set period.

Whether user accounts are disabled first or removed immediately is configurable.
Two user account clusters can be configured independently.
User groups - other than Public Front-end - can be included.
Specified user IDs can be excluded from disabling or removal.
Admins and users can be prewarned by email notification about pending disable/remove.
The plug-in is ideally suited for Joomla! websites that render services to registered users during a limited subscription period.

Configuration overview: see here.

Requirements: Joomla! 1.6 or 1.7 or 2.5. PHP 5.2 or above.

Basic install, upgrade and setup instructions are in the documentation that comes with the download package.

Backend language: English.

License: For personal and business use. License terms are here.
Support: Extended support. Support terms are here.
You may find the answer to your question on our forum.

Discount and refund policy: see here.

You may want to try the free standard edition first. The standard edition has limited options and comes without the re-activation component.