You might be able to do it by modifying the scrapebox.ini file in your install directory. Again, this is just a wild guess so you would have to do so at your own risk. Maybe someone with more knowledge on the subject will can chime in.
s4nt0s is right, you could go for that but if the producer left it that way it is best not to mess around with it since it maybe has something to do with the programm crashing much more often