I upgraded from 15.1 to 16.1.  I upgraded document management as well.  All the windows 7 machines installed the DMCLIENT fine.  However the Windows 8/10 machines, all gave this error when installing the DM printer portion of the software: "unable to add the per machine printer connection". "Another printer or printer share with this name already exists. Please use another name for the printer".  This is true as the machines were already running document management 15.1.  I'm not sure if this is going to be a problem or not.  I can view documents and print them to the printer.