Ahhh- yeah, that’s not good. You need to update.
To manually update :
1. back up your site (optional safe measure)
2. download the latest Pro version from your account here: https://www.wcvendors.com/my-account/
3. deactivate & delete your current WC Vendors Pro (info is stored in your database…)
5. Immediately upload the new Pro version you downloaded from your my-account on here.
6. Activate! ?
Then I can help you with the license, if needed.