I had a situation the other day where I upgraded to RSDLite 4.9 and it wouldn't see my phone. I went back to 4.8 and it could see my phone, but then it wouldn't take the SBF file. My Desktop was cluttered with SBF files. I am running Windows 7 64 bit. I remembered reading somewhere that putting the SBF file in the root of your C:\ Drive, and renaming it to something like r.sbf or r1.sbf would work. Once I put it in the root of my C:\ Drive, RSDLite 4.8 recognized it and my phone was back to normal.