MAX Frame Buffer not working

I have been using SR lite with no problems. I have now purchased the full version and found that the Max frame buffer does not appear when I hit SR render. For a while the Vray frame buffer was not appearing too but after using the reset vray button, this now works.

I have also run into an issue with the Gamma Override settings when importing maps. On some of the materials the gamma has been reset to 1.

I can work around the second problem but I desperately need the Max frame buffer...