Hi Dongle,
One method I use to create a one bar ending is to place a held chord on the ending bar. You do this by placing 3 dots after the chord name eg. E...

I see from your post that you have a 12 bar blues of 4 choruses and that you then want to finish with an ending on the E

I would configure the song settings this way:



1. Click Tag exists
2. Fill in the 3 boxes as shown
3. Make sure you remove the tick from "Generate a 2 bar ending..."

On Bar 13 place your E chord followed by three dots.

Regards,

Richard Williams
Sydney
Australia