Hi,
This should be completely unnecessary as an ionCube version 10 Loader should be able to run any ionCube-encoded file that an earlier version could run. So, for example, Loader version 10.0.0 for PHP 7.0 should be able to run WHMCS just as well as version 6.0.2, say. With bug fixes it should, in fact, be more reliable.
If there are any issues running WHMCS with ionCube Loader version 10 then please let us know as soon as possible at our support Help Desk at https://support.ioncube.com
Alastair
ionCube