Jigoshop files on my server – security issue question

Q: Do any Jigoshop files need to have executable permission on my server? I was told that there is no reason to have executable files on my site and that having them as such can make my site susceptible to attacks. Is there any functionality problem with changing all my Jigoshop file permissions as non-executable?

A: There are no security issues with Unix default file permissions (644).