QTR-Quadtone RIP

This is what I expected. The individual ink curve settings at the bottom are overriding the boost setting. 

For the boost setting to work you need to let QTR build the gray curve using at least one partitioned gray ink (usually K). 

With your ink curves the 100;100 point is being mapped to your limit, and all the gray curve stuff is being ignored/overridden. If you want to make the 100;100 point be 30 like your boost setting but everything else be the same as it is now, you need to open the .quad file in a text editor, go down to the lay number directly above # C Curve and change it to 19660.  (Which is just 0.3 * 65535 instead of 0.2 * 65535 )

RB