Corel Painter Essentials 5- Brush turned into an eraser

So I've been running corel painter essentials 5 for a few months without a problem. Two days ago 2 of the brushes in the f-X category started acting weird. Pretty much the gel airbrush and glow brush wont paint anymore but now act as erasers, pretty much erasing all coloring on any layer I use it on. I have no idea how to fix it and have even uninstalled and reinstalled the program onto my laptop (windows 7 operating system). I use the gel airbrush pretty frequently for shading and would appreciate any help getting it back to normal.