If I were you I would update to 1.5.12 you can run on 1.5.10 but you will see outdated templates in your ACP. Plus 1.5.12 has some new features.Okay, I have purchased EDGE, and I can only see 1.5.12 in my download center.
Now that begs the question, do I need to update my Xenforo to 1.5.12 before I install this style? Right now I am running on XF 1.5.10. I hope that should not be an issue.