Yes, in-house users with Crik-IT admin permissions can do this by clicking on the Tools tab, then the Make Bulk Changes button.  From there, choose ContactNoteType from the drop-down menu.  Then choose the type you want to change, and the type you want to change the contact notes to.  You have the option to filter which contact notes to change based on contact note date, contact note responsible user, and contact note status.  Then, click the Change Contact Note Type button.  When Crik-IT has finished changing the type on contact notes, it will display a message telling you how many contact notes have been changed.