I have a self-renewing subscription to Desktop for Mac for 2 computers, but over the years it tends to be different computers I'm using the license on (home machine, work desk machine, laptop, spare work laptop). But always 2 (at most) at one point in time. At the moment, both my licenses are "blacklisted", which I presume means they're in use. The knowledge base suggests I just need to log out on one of the two computers that currently uses a license and I can re-use that license on the computer I want to use it on now, right? But: the license manager on the website doesn't tell me _which_ computer currently uses the license... How can I find out?