why is it not acurate?
i used to work for a caterpillar dealer so i know how it works.
there are only a small fraction of fleet customers that have large fleets and 'in house' maintenance teams that are allowed to have a stripped down version of Diagnozer with special permissions through the dealership and MCFA. If you're one of those then i stand corrected. But the general stance of MCFA is it is not available to any unauthorized person NOT trained to use it, and it will not be installed on any device not authorized.
The other thing that supports that is the fact you cannot update it. If you have an older version "pre-online updating capability" of the software you would have to return to the dealership to get an updated version that does work for online updating (cloud based) as you put it. They would supply you with a 'current version' on dvd or supply you with an update link and authorization key to validate it after they reported it to MCFA to put in their database so you would be authorized to do so.
Actually that software does have the capability to update the database files remotely even in the old versions as well as using a dvd disc.
I'm sure by now it's all remotely done.
You are correct, it is only good for like 90 to 180 day intervals, i forget which but i remember having to update mine pretty regularly to keep it up to date.
Since then we dropped the caterpillar line and went to another brand but i did get to keep my version on my old laptop. It cannot be transfered,it is married to the laptop service tag is why. And i'm sure when they installed it on your laptop the service tag or product id was recorded at that time so they could identify you.
If you have any other version of this application that does not have that capability in it, it is not a legit copy.