Has AED - Emirati Dirham vanished

I have been using Manager for several months, very happily. However, today I have tried to enter a new account. All went well until I tried to enter our currency, AED, and it seems not to be on the list anymore. It won’t accept a manual entry, so I am stuck. Any idea what might have happened to the Dirham? Or how I can get round it?

I am using version 15.5.93 and the Dirham is there. What version are you using?