When you update WHMCS, the system will attempt to delete unused legacy modules.
We recommend downloading security updates as soon as possible.
If you have remained on a WHMCS version that is past its End of Life (EOL) date for multiple years, we recommend that you update WHMCS as soon as possible. Make sure that you meet the system requirements for each EOL version that you upgrade through to reach a modern, supported version.
You can check for updates to WHMCS from within the Admin Area.
Before you update your WHMCS installation, we recommend several preparatory steps.
You can set a maintenance message to display while you update WHMCS.
You can set a directory to use to stage files for updates.