This got me thinking. I once worked out a way to get the extended characters to show in SignLab 8.
It's a weird, complicated, hidden, secret, easter eggy type of hack that no-one knows about.
I forgot how to do it for years, but just worked it out again!
Here's the combo:
1. Click A to get Text Tools.
2. Right click first A to bring up Font Detective.
(Note, doesnt work if you go ahead and click the F for font detective)
3. Choose Font Group, then the font you want.
4. Press Shift + Left Click the Select Button.
There they are! The whole Character map
I thought I'll write this down here so I can come back to it years later if I need to!
(I'm still happily running SL8)