I'm trying to use the Advanced Search/Replace feature in my 2011 version of Word.
I was able to toy with it on a few examples, but now the Advanced Search/Replace window seems frozen : even though the "Search" field has editable appearance (bright color, live cursor inside it), I cannot do any editing in it, my keystrokes seem to have zero effect. The "Replace" field on the other hand has uneditable appearance.

Any help appreciated.