For EXISTING licenses, ones purchased up until now, yes. Under the old license, you are perfectly entitled to run multiple installations under certain circumstances. We will continue to honor that license, and you can continue to get upgrades from that license with a 75% discount over whatever the normal rate is. The normal rate now is $125, meaning you would pay $31.25.
That old license does NOT carry over to new purchases - each individual instance of the software would require a seperate license.