Its very probable that if an application works with windows 7 then it will work with windows 10, I have a lot of games installed on my laptop that used to work with windows 7 and 8.1
If a motherboard says it was designed for windows 7 then it should work with windows 10 no problem. it might be a bit slow due to the age of the hardware. if you think you might have a problem, you can start the install of windows 10 and it will check your system compatibility. unfortunately there is no standalone upgrade assistant app for windows 10