Techstream Software?

[LX470 AUS]

I want to check neutral pressures on my AHC. I purchased the tactrix open port 2.0, and downloaded the techstream software. It is asking for a registration key, do I need to purchase this, or is there a way of using a "visitor" key to use it for only a short time?
Or alternatively, is there any other free software I can download to check the neutral pressure?
Thanks

 

[Actualeyes]

Most of us purchase the MiniVCI which comes with a hack for the techstream software. Maybe it would work for you... PM met u want a hand.

For clarity, put "MiniVCI" into eBay search. Today this is an eBay Australia link; www.ebay.com.au/itm/2013-Mini-Vci-F..._Parts_Accessories&hash=item3f248b27ea&_uhb=1