The latest firmware I have is RN2483 1.0.2 Jan 21 2016 13:52:51. This also fixed the bootloader when programmed via the programming pins and not the UART pins so that you then dont need to switch baud rates part way through the process.
Apparently this was withdrawn and a new release is on its way. It could be why my usual suppliers have no stock of RN2483 modules until end of April/May time as Microchip are updating the firmware to the certified version.
Andrew