Help! How can I save my mail data?

I used eM Client which Version 10.0.1495.0, But today I get the warning screen as below, and the application software automatically exits. How can I Re-Open the eM Client application software to save my previously received mail data?

Please see: Unauthorized License Detected warning while using valid license - Powered by Kayako Help Desk Software

Download and install the certificate and see if there is any difference.

Thank you! I can Reopen the eM Client application software after I modify the registry: HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\SystemCertificates\AuthRoot,the DisableRootAutoUpdate key from 1 set to 0.