That would depend on the licensing then. While many products do (still) get licensed and tied to specific machines, it's typically considered that if you have X licenses it means X simultaneous installs or X simultaneous active users (that is, I can have it on two machines that I primarily use, but I'm only using one at a time so a single license may be ok, again depending on terms).

If there were merely 558k non-simultaneous installs, this would be much easier to resolve.