I just played with the workaround... I have the Nightsword and instead of going to advanced I did what Beefy was talking about and left it on the "Selection" tab and just chose "Sniper" because for me the Drop Down on the "Advanced" tab once "Retain original input" was selected did NOT appear... (I don't know why or which of these 2 solutions worked for that separate issue but I... 1.) Repaired the Installation and 2: Used a new (supplied by CUE) Mouse profile "NIGHTSWORD RGB HW 1" as sen in upper left corner, I know that sometimes certain features and Dropdowns are Disabled or won't even show when in a "Default" profile).
The above setup I tested with a 20 second hold and the DPI returned to its original 1750 from 400. WooT!