Coral Painter Problems

I wanted to use Coral Painter to edit and touch up my paintings, but my account expired and I'm not able to log on unless I pay a ridiculous amount of money :( but! I do have another program called Sketch Book Pro. I don't really know how to use it, but I will learn just in time for my presentation. This definitely puts a damper on my work flow, but I will get past it and finish.