PRISM Central's releases are linked to NOS and since the latest version is 4.1.4 so is PRISM Central.
Nutanix recommends to upgrade PRISM Central to the latest version and then match the NOS install on your clusters.
- Log in to PRISM Central
- Click on the gear icon and select upgrade Prism Central
- Click the download button
- Confirm the download when prompted
- Once the download has completed click upgrade and upgrade now
- Confirm that you want to upgrade
- You are finished. You can confirm that you have latest version by selecting "About Nutanix" from the admin menu