Step-by-step
The 4PSA license keys have an expiration date which is automatically extended as long as your SUS is valid. If your server was not able to reach the 4PSA license server, your key may have expired and you will be able to access the license screen only. Even so, the application continues to work.
When you upgrade from Plesk 8.x to 9.x, you should also upgrade the 4PSA add-ons to newer versions, or this may cause the web interface to inform you that the license key is for a different version and ask you to enter another key. This may also happen if you upgraded only the add-on to a new major version, i.e. upgrading Clean Server from version 2.x to 4.x.
If your license key has expired or it is for an older version, click the Get license button and a new one will be retrieved. Your server needs to access the outside world on port TCP 80 to fetch a new license.
If the Get license button does not work, you can manually reissue your license key from the client area:
STEP 1: Login at http://4psa.com/clients.
STEP 2: Go to 4PSA Keys Management > Reissue License Keys.
STEP 3: Click on the reissue link corresponding to the desired license key.
STEP 4: Choose the right version and click OK.
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