I'm using Windows 8.1 (x64) and I do not use any other Overlays.
I just looked the console and nothing came up there:
After many attempts I managed to launch RTST with game normally 1 time only, but after that CTD continued.rtst_d3doverlay_x64.dll loaded.
Install Hooks Function found.
Attempting hook 3.
Hook ready
Uploaded log.txt file for you:
https://www.dropbox.com/s/yr56yec2465ckl8/log.txt