2015 MB SD C4 WinLicense error & Internal error: (3.17)- 3.219

I bought the Mercedes MB Star diagnosis SD Connect C4 with 2015V DAS Xentry hard drive last year. It works without issue. But today it suddenly gave me 2 errors:
1. WinLicense error

Error message “This software does not accept more hardware changes. Please contact support@yoursite.com”

mb-sd-c4-winlicense-error

2. Internal error: (3.17)- 3.219

Internal error: (3.17)- 3.219 You must contact the User Help Desk.

mb-sd-c4-internal-error-3.17

Solution from mbstartool.com engineer:

Delete the file “lic-key-2” and “x4711” if you have activated your DAS xentry software.

Re-activate the Xentry after delete these files.

If the error still exists, you have to send your hard drive back to repair.