I can't answer you since I don't know the license you are at and especially your new W10 license.
Most W10 upgrades are locked to the motherboard so if you change the motherboard your license is dead. SORT OF!
We know that Microsoft will not want to take this to trial so the word is if the license fails you get to call it it to reactivate.
It would take a lot of posts to cover all the angles but you only have till the 29th to change the motherboard, install W7 and do the upgrade for free.
So I'm upgrading a current PC which includes a motherboard switch, and am also planning to update to W10. The PC I have was store bought with W7 and offers me the W10 update. I've read places that if you change a motherboard with changes such as the socket, it may take away the option to update to W10 or, if you've already updated, may break W10. Does anyone know for sure if this motherboard change would still allow me the free W10 update? Thanks.