There has been a change in the way the font weight/sharpness settings are stored in the .conf file, each now has a single numerical parameter, so easier to tweak by editing the file if you can't get the weight/sharpness setting you want from the slider.
3.2.0:
Code:
readingFontSharpness\Dark%20Courier="@Variant(\0\0\0\x87=\b\x88\x89)"
readingFontWeight\Dark%20Courier=@Variant(\0\0\0\x87>\x99\x99\x9a)
3.3.1
Code:
readingFontSharpness\Dark%20Courier=0.0466666666666667
readingFontWeight\Dark%20Courier=0.34
Edit: On my Glo the slider sets the font weight from -0.2 to 0.8 (default 0.1), and sharpness from -0.4 to 0.2 (default -0.0667)