Go to your start menu and choose Run, type in regedit and hit okay.

Then go to HKEY_CURRENT_USER/Software/Ahead/Preferences

Look for Compress Mode in the sidebar

Your value will read 002 which is the default Sharp setting

003 is max sharp
002 is sharp
001 is smooth
000 is max smooth

To change the value click on the compress mode, then modify and change the last number to the value you want.

In order for you to be able to do this you must have used Recode at least once, so the program can set the value.