The underscores to spaces function is in a similar place to where it was in the Opus 10 default toolbars:
I don't think Opus 10 ever had a default for dots to spaces.
If you need to turn on your old customized toolbars to grab some of the functions from them, this guide explains how: Your old toolbars are still there after you upgrade.
Hopefully wowbagger's suggestions above do what you want, but if not shout and we can help.