This update contains the following features:-

Siemens airbag 1 protocol as used on Freelander 1 from 2002 onwards.

EDC15C4 / DDE4 diesel (Freelander TD4 / Rover 75) ISO protocol, which is the Rover way rather than the BMW way (i.e. how a T4 does it). The protocol also contains a injector balance measurement tool which I am told is important.

Improved error code accuracy for DDE4 diesel.

For many of the protocols I have gotten rid of the warning about possible short to +12V as this is a red herring on Rovers as they don't follow the standards correctly.

Previous update is here http://www.rovertech.net/forum/viewtopic.php?f=144&t=150338

How do I update my device. I have plugged this into the laptop but it still shows version 41

connect the laptop to the internet and run pscanloader

you do not need the interface to be present for the update to happen

My update shows 41B is this the latest?

Yes it is.