[Thinking of buying Publisher - Question]

I have always worked with Microsoft Office Publisher, we are small print shop and need to be able to have CMYK capability for our files.  It was suggested in a forum that I try this software since most think MPublisher will eventually be phased completely out.  Since we have over 10 years worth of Publisher files that we often go back to making edits, additions, etc., I need to be able to access those files in the future with the information in them such as fonts, sizing and margins preserved.  Do you think I would be able to access that in this app and convert to an editable file type?