I install multiplicity each time I reinstall Windows. It seems that the activation count will increases each time, so after a while you can't use it any more. The support is not the quickest, and the only reply I up until now was not helpful at all. The problem has not been solved yet after almost a week... Suggestion: Count number of actuall install that is active. Right now I have 1 master and 1 secondary (and 1 secondary with a non activated install).