The 'n' (4th token in the profile name string) refers to the color management.
From the same README file as previously highlighted ..........
2. Color Management (refers to 4 in Profile Naming explanation)
Color management: (lower case last letter(s) in the profile name)
In the printer driver use the following set-ups.
For Canon: In “Properties”, go to “Manual”, in “Color/Intensity”, press “Set” and select “None” in the “Print type” menu. Note: Very Important, especially where Photoshop manages colour.
For Epson: Go to “Advanced“, select “ICM“, in “Color Management“ select “Off”(No Color Adjustment). Note: Very Important, especially where Photoshop manages colour .
For HP: In “Properties”, go to “Color” and select “Application Managed Colors” in the “Color Management” menu. Note: Very Important, especially where photoshop manages colour .
Color management: (no lower case last letter(s) in the profile name)
If there is no lower case last letter(s) (...n.icc or ...amc.icc) in the profile name, keep the Color
Management setting as default value.
n: Color correction:None (Color Mode) (for Canon printers) mmo: Matching Mode: Off (for Canon printers)
n: “Off”(No Color Adjustement) for Epson printers
amc: Application Managed Colors (for HP printers)
mba: Managed by Application (for HP printers)