Tony, I downloaded Notation Composer to compare it to other software that I was familiar with. It does have a Quantize function which will be useful for what you want to do.

It can export Music XML files so that the file it makes can be transferred to other notation software. But it does not support import of Music XML files. This means that it can not import files from music OCR programs that can scan existing music sheets and create XML files (like SharpEye for example). I use scanned music sheets often when I want to edit the song files to format them for my Music Pad Pro or to simply make chord changes from an existing sheet.