You could have known it.
Windows 10 is not officially released yet.
It will be soon if everything goes as planned.
The word is it will be released as final in July.
But with Microsoft, you never know
Another thing is that GrimeFighter doesn't work on all hardware configurations.
It could be yours is not (yet) supported.
It is just my opinion, but as I see it....
GrimeFighter is a waste of money.
It doesn't work on many hardware / software configurations.
It doesn't do anything that free tools can do too.
My advice (and your choice ofcourse) is to ask a refund and use other (free) tools.