About a year ago I had a hard drive crash that wiped out one of my NIS installs. I have four computers with NIS installed on them and two NIS subscriptions so it wasn't a problem at the time because I could install NIS on a total of six computers. I just used one of my remaining two installs. The only problem is that my subscription status now shows only one free install. Is there any way to recover the one install which I lost with the hard drive crash?