Hi Erika,
Using the theme (at the downloaded version) is not conditioned in any way, but access to new updates and the companion priority support service requires an active Plus theme subscription. Your existing subscription has ended in April 2021.
I have manually extended your subscription until the 15th to be able to access the 1.2.4 update, as it technically was available during the original term of your subscription.
You can renew at any later date by following the link in your account if you wish to restore access to future updates and priority support.