I'm a little surprised by the diocese's response. I'm curious as to her persistence in pursuing this. In my diocese, most financial information is presented to the public in a balance sheet style in the bulletin. General biographical information is also made available. I'm curious, and the article doesn't really say, about the 'why' of her actions. Is she a nut job? Or a whistle blower? Sadly, in my diocese and in my parish, several 'nutjobs' who were dismissed and told they weren't welcome, and one was kept away by letter, turned out to be vindicated (never officially) when a variety of errors were uncovered and corrected.
People who were once well thought of do not become nut jobs later on. They are usualy ahead of the curve. I suspect she has been told that the priest has some skeletons in his closet, some of which may be related to finances at a previous parish. Doesn't have to be sexual abuse skeletons.