Filter out filenames beginning with exclamation point

I am trying to synchronize my scanner's output folder to another backup location. There are tons of files that begin with ! that I am not interested in backing up. I thought I could use the synchronize function with a regex filter like

Name  No Match  ^\!

But, it didn't work. The files weren't filtered out.

How do I do this?

Thanks

Seems to work OK here.

Did you select Use regular expression for the Name clause?

It seems to be working now :unamused:

I think I must have had multiple filter dialogs open and lost cm at some point