Unable to change name of new GUI element...

Hello again,

So, in going through the project here, I decided to follow the documentation for editing/creating GUIs in TGEA. I got to the point where it's asking you to create a new Dialog element, and I'm supposed to type "Hello World" into the name field on the 'create' dialog window. However, it won't let me type anything.

It lets me delete what's already there, but I can't type anything new.

Any idea what might be going on there?

Thanks :)