BB Q10, why have my custom contact notifications reset?

NEVER MIND, found it.

Original question:
All of my custom notifications (sound and LED colour for text messages) reset one in the past week, without me doing anything special. This has been working through several OS upgrades so it is kind of a surprise.

Anyway, when I try to add the notifications back in, I can define a LED colour, but not a custom sound, there are three alternatives; On, Off and Profile Setting. None of them gives me the option to pick a custom sound. Where am I supposed to do this, I am lost and I cant really live without the custom sounds.