HELP!! PROBLEM WITH LICENSE KEY

[julienpaul]

Hello,
Stepcraft M1000 / UCCNC Usb wired (Bought new June 2023) working perfectly since
I suddenly have a pb with Uccnc which doesnt run anymore.
When turn it on, appears the message "valid license key was not found appli in demo mode"
I have: dis/re install Uccnc & copy the file (as it was before when it worked perfectly)
Re install windows with a precedent version
Change the usb cable & verify all connections
I precise that on the Uc100 the blue Led doesnt light but the green is on.
So what can I do, Can someone help me.
Do I have to buy a new UC100 (I bought it only one year ago)
Or is the license file corrupted (how is it possible?)
My UC100 S/N : 907F1E.
THANKS

[dezsoe]

The license file should not change by itself. First run the UCxxx_utility (UCCNC\Util) and scan for devices. Check if the UC100 serial is good. Also, you have a mail where you got the license file. Save the file again (into UCCNC) without opening it.

[julienpaul]

So I run the utility scan and surprise my S/N in now 027F30
????
THANKS

[dezsoe]

That's strange. On your UC100 you have the other serial number?

[julienpaul]

Yes the S/N on my uc 100 is 907F1E
And now it says UCxx device was not found

[cncdrive]

It is very likely that the USB chip of the UC100 damaged.