Hello Steven,
Thank you for submitting the question here. When your license of our extension is expired, you simply can not upgrade it to the latest version. It is not related to the new products won't show on your website.
I think there is some wrong settings of your store. Please submit a new ticket to EShop category to send me the super admin account to your site so I can help you to check.
Hope to hear back from you soon.
Sincerely, Giang
