Rsform Pro 1.4.0 Rev.46 For Joomla 2.5 ◎

However, if you are writing this for a technical changelog, database, or CSV export, the most proper normalized version would be:

Based on standard software versioning and Joomla extension practices, the format for that string would be: RSForm Pro 1.4.0 rev.46 for Joomla 2.5