I didn't see anyone post on this question.

When EFILive Scan & Tune is open, Options, F5 Black Box settings.
When making changes to PID Menu Items, Menu Properties and clicking OK.
The available PID are removed and left with external PID.
Those can't be added!

The only way to get the available PIDs back is to save the change(s) that were made to the PID Menu Items, close Black Box Settings and open Black Box Settings again.

I hope this is a bug like the way it was in prior releases in Beta testing.