Microsoft does not force you to use Windows 10 - it only offers to reserve your copy, and when the time comes to download Windows 10 and do the inplace upgrade for you. It is completely by choice, you are not forced to upgrade to Windows 10 (contrary to what a lot of people say).
If you do not want the "Get Windows 10" app to appear again, I suggest that you check this thread
by my buddy Aura.
You will have to upgrade to 8.1 or 10 in five years when Windows 7 reaches life of support anyway, so I think you will have some time to think about your choice before then.