Horizon won't open correctly

I installed the latest version of Horizon from the website. I disabled my antivirus and firewall and ran as administrator. Whenever it opens, it displays white boxes with red Xs through them where pictures are supposed to be (except for the ad, the ad displays just fine). Whenever I click on anything, the program crashes. Any ideas?

You need to change the theme on your computer.
I only know this thanks to Chris. I’m assuming This is the same problem you have.

I changed to a non-Aero theme and now it works just fine. Thank you.

Do I have to be a member on horizon to use the mod program for dungeon defenders?

No, the free tools should still work.