If you were running a version prior to 1.0.5, you will not be able to see any of the images in your original game threads and will have to start over again.
Thanks, for letting me know. Again, that comes from me only testing upgrades and not new installs.
No, default xenforo 2 style without any modifications.
If you have any other add-ons installed, disable them and see if the add-on works.
Have you edited any templates in the default style?
Would it be possible for you to send me a temporary user name and password and give admin access to me so I can try to debug why it's not working for you? Send the login info by PC if that's possible.