I don't know how to solve this, but since I changed my Notebook's HD and re-installed SAI, it is not working as before. Every time I open the program, it shows two cursors: one cursor moves normally, but it draws the line a few millimeters away from it, where is the second cursor. And the second one only appears over the canvas. I've tried to change my pen to mouse mode, but it didn't work. Does anyone know how to fix it?