I recently installed Pixel Bender, and it worked the first time I started it, but I've since updated my NVidia driver, and now it crashes on start.
I've tried changing the program setting in the NVidia control panel, and tried every compatibility options, as well as 16 bits colors, but it only works in 256-color mode, as suggested in this old thread:
256-color mode makes it impossible to visualize any kind of basic shaders, so I'm forced to export it to flash develop at every change.
Device manager doesn't propose any roll-back option, and my computer badly needed that update, I am stuck.
To solve this problem just change name of sniffer_gpu.exe file in the Pixel Bender Toolkit folder to any other without ".exe" e.g. sniffer_gpu.exe.bak. This will stop this toolkit to look for GPU that may be incompatible with app (look at manual for supported GPU) and forces to use CPU to render images.