In the locations box, I see the words 'Fixed', 'Changed' or 'No error found'; what do they mean?
PerfectIt presents its results in the locations box.
Each line in that box represents a point in the document.
Click each line, and PerfectIt will take you to that location in the text.
After you click 'Fix', the label in the locations box changes to 'Fixed'. If you click on 'Undo' in PerfectIt, it changes back.
If you decide to change the text manually in Word yourself (instead of clicking on 'Fix'), then the text will change to 'Changed'.
If you delete the point in the document, the label will change to 'no error found'.
If you choose to alter a location manually, the text at that location cannot be changed by PerfectIt unless you run PerfectIt's checking again.
You can always make further changes by typing directly into MS Word.