LaserSoft Imaging

I have purchased an IT8 Kodachrome Target from ScanDig
I am using SilverFast 8 Archive.
The movie says the IT8 will come up with the message "IT8 succeeded with DeltaE = 1.0" The DeltaE I am coming up with is 1.8, I can't find anything that says what is satisfactory.
The movie then says dialogue will come saying where it will file the calibration - this does not happen and I can't find the file
Do I have to calibrate in SilverFast HDR as well?

Dear customer,

A Delta E value of 1,8 is fully acceptable.
SilverFast accepts values below 3.
If the values are outside the accepted range you will get a warning message.
The IT8 standard even allows values up to 5.0.

Kind regards,
Arne Ketelhohn.