Notezilla basically remembers the title of the window that opens the file. For example, if you have the .doc file, it will remember the title of the window, in this case Microsoft Word - xyz.doc.
Watch this short video for more clarity:So, it depends which file you are opening in what program. If the program shows the complete path of the file, then moving the file will deactivate its functionality of appearing automatically when the file is active. If the program is only showing the file name and not the path then renaming the file will deactivate the stickiness functionality.