Windows 10 does updates – automatic updates – a lot. And, sometimes these updates can mess with your Carlson license registration. Carlson has free technical support so you can always call 606.564.5028 or email them at firstname.lastname@example.org during regular business hours but, if this happens on a weekend, their support staff is probably out enjoying Kentucky bourbon. Or something.
So, when Murphy’s Law strikes, you can refer to this Knowledge Base article on Carlson’s website: Carlson KB 995: Windows 10 effect on previously registered software.