Dev License: This installation of WHMCS is running under a Development License and is not authorized to be used for production use. Please report any cases of abuse to abuse@whmcs.com
Yes, you can upgrade to higher plan anytime and without loss of data. Though your data will remain intact during an upgrade, we strongly recommend our customers to maintain a full backup of their important content in the local system. During upgrade/migration procedure, a couple of reboots are required. You will experience 10 to 20 minutes of downtime during the upgrade process.

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