How to solve Xentry/DAS error Fault (30.3) No valid DAS license

Here are some tips for Mercedes MB Star diagnosis SD connect c4 or MB STAR C3 users when they run DAS but meet with
Fault (30.3)
DAS-Fault-30.3-No-valid-DAS-license-solved
You can try to:
change your PC date backwards; then you will have to fix Xentry.
or
need a complete set of new keys——–ipput via star utilities, because you switched computers your MAC and LAN Address changed
Still not solved?

obd2eshop engineers think that you should activate your Xentry/DAS software with the help of the dealer.

Send to the dealer:
Hardware ID XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX-XXXX
LAN-ID XXXXXXXXXXXX

HW-ID XXXXXXXXXXX APPID XXX

XENTRY activation manual:
Run “Get Hardware ID”
COPY HW-ID:XXXXXXXXXXXX & APP-ID:XXX in Startkey Center
Then Startkey will be sent back.
Paste the Startkey and activate Xentry.
Xentry works
DAS activation manual:
Run “Get Hardware ID”
copy the generated hardware ID to the dealer for the license.reg file
Run file”license.re

DAS works!

Note:
Run Mercedes software always in the same laptop; otherwise you need to re-activate software after laptop change
No valid DAS license; DAS will now be closed!