the license change was announced in the announcement forum:
It is also listed under the FAQ tab of the PowerCMS Product page:
A: When you purchase PowerCMS, you receive a single license to set up PowerCMS on one domain.
It is not something that is being hidden.
solution packs do not have any activation. This is the main reason they cannot be refunded. They are prebuilt PHP code.
There is no way to ensure that you don't continue using the php once the refund is processed.