upgrade to family pack

Hi,
I've been using Hazel for a while, installing it on my two machines.
Since my kids got their own machines, I have to buy another license.
Is it possible to upgrade my single license to family pack?
I've been using Hazel for a while, installing it on my two machines.
Since my kids got their own machines, I have to buy another license.
Is it possible to upgrade my single license to family pack?