I had an additional PHP version (5.6.0) installed and activated for one of my clients. Yesterday I had to restore a server from a backup (only a few minutes old) and now the additional PHP is not working. When I edit the clients site, I only have an option for "Default" in the PHP version. I have checked that it is still on the server (which it is) and that it is still configured for the client. I have also just added PHP 5.6.18 to see if I can get them back up and running but again, it does not apear as an option in their site configuration. Where can I start to look to debug this?