I have a computer with 2 versions of QGIS. Both versions are running on Win 7 64 bits with 16 Mb of ram. One is Dufour 32 bits and the other one is version 2.1 OSgeo4W 64 bits.
I am experimenting using the processing menu on both versions. Nevertheless I noticed that the paths for Grass in my 2.01 32 bits version were the ones of the OSgeo4W install (Processing/Options and configuration/Providers). I changed to the Dufour ones.
Then I tried to replicate a procedure in my 64 bit install but the paths were the Dufour ones!
My question is, then, how I can handle the settings for each install in order that they are independent from each other and I do not have to change my provider paths each time that I want to use the processing menu.