Paintstormstudio.com

Hello, is there a way to get back the primary (original) contents of "painting palette" subwindow? I mean those nice color patches laid on the small amount of this area (looks like famous equivalent in Corel Painter). I incidentally erased it and now want to use it again. But any resetting can help here...
Any comment, please?

for PC version: delete "Documents/paintstorm studio/data/mixer.png", restart Paintstorm.