I thought I would add to this topic, since it is close to what I want to do. RegExes drive me borderline insane and this is really getting to me.
I have hundreds of files that were named by someone who didn't think to name them so that they would appear in a chronologically-correct manner. The file name mask is:
I simply want to change it to be:
This seems simple, but I can't get it right. Please help if you can.
Also, it seems from the solution above that parenthesis are used to define groupings into \1, \2, etc. However, the help file refers to "brackets", which are [ and ], not parenthesis:
Notice we had two sets of brackets. Everything within each set of brackets is treated as a "grouping", and we refer to these groupings as \1, \2, \3 etc.