Geneious Prime reverts back to restricted mode when the subscription has expired. You will receive a reminder before the expiration date. In restricted mode you can view your local data and import and export your files. However, most other functions are disabled.
If your plan includes a Cloud workspace, then after your subscription expires, your Cloud workspace will be moved into a read-only mode for 30 days where your data can be exported. After a further 60 days your data will be deleted from Geneious Cloud.
To continue using the full functionality of Geneious Prime you will need to renew your plan.