Ok so it seems like I have exhausted the licenses I had.
I had to install BI while setting up a new computer after my old one died. I didn't find a way to deactivate the license on this site for the old computer.
Same problem. I have Black Ink installed on two computers. On one of them, Black Ink seems to have lost its license association after a Windows 10 feature update. Now my account says that the two licenses are exhausted and Black Ink has to be reactivated on the same computer where it previously worked!