Hi all,
I am trying to use advanced rename "clear spaces" preset and nothing happens. I also want to copy "clear spaces" and edit it to create a preset that clears "_". 
I don't think "clear spaces" is a standard rename preset. Is it one you made yourself or got from the forum or somewhere?
Wherever it's from, can you tell us what it looks like, and what it's intended to do but isn't doing?
This sounds like one of the buttons you and others helped me out with recently, the one that made DOpus crash. (Don't put "%" in the text for a context menu, was the lesson we learnt.)
To achieve what the original question asked for, I use this:
@NoDeselect
Rename PATTERN="_" TO=" " FINDREP
It is attached to a context menu, one of several that eliminate "internet crud".
About the second part to the question... about "copying" rename presets...
There are no "copy" or "duplicate" buttons in the advanced rename dialog like there are for similar 'settings' related dialogs elsewhere in Opus. Instead, you can just select the one you want to copy (say "clear spaces"), make the changes you want to make to it, and then hit the "Add" button in the rename dialog... it will SAVE the changes you made to the existing preset, as a NEW preset as long as you specify a different name to save it as 
. Otherwise, saving changes to a preset using the existing name of the preset is how you actually "edit" and save changes to an existing preset...
Thanks for the information.
I don't know where this came from. I have never used advanced rename before. The "clear spaces" was already on the list.
Everything below "Last Rename" has been added at some point by you. None of those are included in a new install.
Maybe you imported someone else's configuration at some point.
Change the Type to Regular Expressions.
Change both (.) to (.*)
It should work then.