One Key Tool Plus users wondered why part of functions were removed.
When he purchased his KTP all functions are active, and he had done ISN jobs on bench using Bosch and Multifunction Adapters. Then he had F30 with B58 AKL and unable to read ISN, To add removed function back, need an extra pay.
Here is the answer:
The previous Read ISN function included engine computers including N20 N55 B38 B48, etc.
The MSV90, MSV80, MSD’s ECUs are newly added modules, which requires new Bench Read ISN License.
Hope this could help!
Skype: xhorsevvdi.com
Whatsapp: https://wa.me/8613983756354
Whatsapp: 
Skype: