Licence suddenly stopped working

Hello,

I have Studio 2019 since 31-07-2018

When I opened Studio this morning, I got a screen with a message going like  "the evaluation period is over (37)"

When I try to activate with my licence number that I copied from my sdl profile,

I get an error message saying "no licence is available for this activation code..."

I don't understand. There is no reason why this would not work. I tried renaming the licence file (studio.lic) but to no avail.

I sent a message to get help, but of course it's Sunday and I need to work!!

So, if by any chance someone knows what is going on here, please tell me :-)

Thank you!!!