Go into PayPal and check under "recurring payments," or "subscriptions." LastPass should be under there. Click it and then revoke the authorization and they shouldn't be able to bill you any longer.
Outside of this I am pretty sure no company is able to automatically bill you on PayPal without your consent, except for a select few companies like Nintendo (where you can pay on your Switch without authorizing any PayPal prompts).
Outside of this I am pretty sure no company is able to automatically bill you on PayPal without your consent, except for a select few companies like Nintendo (where you can pay on your Switch without authorizing any PayPal prompts).