How do I stop this popup after I close X8??
yeah, that crap "subscription" (see how it's not in a BOLD LETTERED TITLE?) is only good for a year, it's NOT an "true" upgrade... all true upgrades are no more. It's misleading basically. It's subscription or "renting" it and once time up, you have to pay another $249 every year for as long as you use it. A full perpetual license will let you use as long as you live.
You used to be able to get a "true" upgrade for $199 (US +tax) or even as low as $129! and use for however long you like!
It should say SUBSCRIBE, NOT UPGRADE!