Here are the instructions to remove a specific plugin/extension from your vCenter server:
1. Point your web browser to your vCenter server: https://your_vc_server/mob and login.
2. Click on content:
3. Locate and click on ExtensionManager:
6. Now, go back to previous page and at the bottom click on the function “UnregisterExtension“. A new window will open and ask for the plugin key id which was recorded from above. Enter the key and click on the “Invoke Method” to remove the plugin