We released jDiction 1.3.0 for Joomla! 2.5 - 3.3. For more information check the Downloadpage. Anyway installing jDiction should not lead to data loss, but can temporally damage your Joomla! installation like any other extension, so make always backups before upgrading.
The Joomla! Stack Exchange Site is in beta so if you have Questions about Joomla or jDiction you can also use JSE.