Uninstalling ndOffice removes:
C:\Program Files (x86)\NetDocuments\ndOffice
and all the files in that location along with the add-ins, the startup group, and all program functionality.
We don't, by design, delete the ndOffice echo location, where we keep the ndOffice database or the echoed files. Users often uninstall before installing a new version (though it isn't needed) and that echo location is used by more than one program from us.