Creature Feature and Ability - I don't understand.

Hi,
I'm new to D20Pro and struggling to create Creatures. Rather than create my own, I'm using "The Wizards Amulet" as a basis for everything.
I can happily enter all the creature details except for the Traits, Languages and Proficiency. (I understand there may not be direct translations of some things, but that's RPG gaming, you adapt it).
I'm trying to follow viewtopic.php?f=14&t=1074 but there aren't enough notes for me to understand the process.
1) For example, I can Add a new Ability, but I can't Edit it once created - why not? Once created I can only "use New Ability".
2) In the "Spell" section, in the "Spell Editor", I can select Spells from the left hand side list and they appear in the right hand side list, but when I click OK I'm still looking at a blank "Freeform" Spells table.
Any help appreciated,
Thanks
Andy.