I run Sierra 10.12.6 on a MacBook Air. I recently installed Digital Camera Utility 4.41 from the updater file even though I did not have 4.0 installed and do not have a CD drive.
I found the updater file here:
Software Downloads : Support & Service | RICOH IMAGING
After downloading it, I unzipped it and PBLU0441.pkg appears. In my folder window, I highlighted the file and clicked on "Get Info." One of the options is "Show Package Contents." In the new window that opens up you will find "Archive.pax.gz." I created a new folder on my desktop and copied that file into the folder. I then unzipped it and a new folder "Archive" appears. In that folder is the full Digital Camera Utility version 4.41. I dragged the icon to my Applications folder and it works fine.
This is a lot easier than it sounds!