Hi George!,
CBR v0.9.0 in 1.8 don't work the "with STF" option. The image is always showed without STF.
I also noticed that the 1/SigmaFactor's value change if you save a New Instance of the script. Example, if 1/sigmaFactor is 5, is stored sigma: 0,2 and when Apply global to restore the script 1/Sigma Factor is 0,2. The result when applying the process is the same in both cases. I don't remmember if it was the same before.
Saludos. Alejandro.