The latest versions of the SwiftModders WHMCS Admin Theme and WHMCS Client Theme are available to download in the Client Area. These new versions are in response to the recent flurry of invalid license error messages you have been seeing.
I would like to formally apologize for the issues that this has caused you over the last few days. I was attempting to migrate over to a new hosting environment that would have improved stability and performance. Unfortunately, the environment was not compatible with WHMCS and thus caused issues with the licensing server. I have since moved back to my previous host and I intend to stay on this host for the foreseeable future to avoid issues.
For all of the trouble, I would like to offer free upgrade credits for anyone who is interested. The value of these credits would be $10 USD in total. You can use these credits to upgrade your license or purchase another theme if you like.
If you continue to have issues with licensing after upgrading, please open a support ticket. Thank you for your continued support!
*Note: This upgrade is only compatible with WHMCS 7.7+. If you are on an older version of WHMCS or the theme, you will need to upgrade. If your license has been suspended, I can upgrade you for free!