sdc4 DAS Xentry on Lenovo X220 need a fixed expiration date?

Have one sdc4 DAS Xentry software preinstalled on Lenovo X220. One question is " Do I have to enter a fixed expiration date ?" Do I need to reinstall the software?  The answer is yes, usually enter to 2022 year.

First comes with some images one user shared: 

obd2shop.co.uk solution:

Delete all of the above files
Reactivate.
This file "lic_key_2.dat" will automatically appear after you activate, please copy and paste this file, rename the ".dat" as ".x4711", and change the file properties as "Read only".

And also check if the EPC you entered is wrong, or the ID is wrong. 

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Thanks