Not working

I need a notetaking app to jot notes down for a class since I dont want to purchase pages simply because this app would suffice for the tasks at hand. Its reads under requirements that OS X 10.6 or later is required-- Ive got 10.6.8 and its not working. I sent a report out, hopefully they find the problem because this would be a great free app to have that I would enjoy using day to day. If anyone here can give any advice, Im open for feedback just in case Im forgetting to format something simple that I forgot to do.

Goudamorning about Quick Note