This was a solved problem: simply buy another Jetbrains 'upgrade' and you get fixes (or upgrades) for the following year. Subscriptions should be entirely optional.
> A company can't live forever on one-time payments.
Which is why they've been charging for updates outside the year. You yourself provided them two recurring payments with no need for a subscription model to prompt it.
You pay for that when you buy the product - it comes with a year of updates.