you wont have to i dont beleive but you will have much outdated software and if for any reason you need to reinstall them you wont be able to
keep in mind though if your on windows 10 since the gui and everything changes so much youll want to renew subscription for patches fixes and improvements otherwise you could have issues.
its like 30 bucks for a renewal tho if youve bought it before so you do get a discount for keeping it
i am however assuming your on the object desktop suite plan as that is the most worthwhile plan.if your not disregard the price renewal statement