How do I delete lightroom from a crashed computer that does not exist anymore?

How do I delete an activated license from a computer that does not exist anymore? I had to take my hard drives out from my computer (I could save them) that literally died on me, but when plugging them into my new setup, the computer did not recognise them and I had to reinstall everything. Including Lightroom. Now the app tells me that I won't be able to use it anymore in 7 days if I do not enter a new license because the one I own is installed on too many computers (though it is technically installed on the same harddrive it had been installed before). Adobe is no help at all because you have no direct support whatsoever in Germany as a single person and I cannot delete a license via the Creative Cloud, for which I thought this programme would be useful, but it is not - or at least I have not found the option within the programme anywhere. Oh, I work on a windows computer, Win10 with Lightroom Classic (6).

So what am I supposed to do? Does anyone have any idea?