To uninstall the SigningHub for Dynamics CRM app: 

1. In case of an on-premises deployment, log into your locally deployed Dynamics CRM instance through CRM administrator user and password (active directory credentials).
   OR
   In case of an Office 365 installation, log into your Office 365 account through Dynamics CRM administrator credentials.
2. Click the "Service" tab and then click the "Settings" module.
   
   
   
   
3. From the next appearing "Settings" menu, click the "Solutions" option.
   
   
   
   
4. The "All Solutions" screen will appear, select the "SigningHubPlugin" record from the list and click the "Delete" option.
   
   
   
   
5. A confirmation dialog will appear, click the "OK" button to continue. The uninstallation process will begin.
   
   
   
   Once the app is removed, re-login to your system to complete the app uninstallation process.