You can only play Chapter Six on the store page, no installation required! I'm assuming the file you have is an old one, you can discard that one. I would recommend saving your save files with the 'Save to Disk' option before deleting it, though, so you can load them in on the store page!
oof, good thing I'm a constant saver, otherwise I would've had to start again (;^.^)
But, man; I just finished the chapter, and I nearly burst into tears when I saw the 'End of Chapter' text (No, Xelara, I don't need a cloth to cry into).
