OK. After extracting the MSI (and all the other files which came with it) from my setup.exe V2.0.12 14,661 KB and V2.0.13, 14,664 KB, I ended up with two MSI files. The V2.0.13 MSI was set as the Upgraded image and V2.0.12 was set as the Target image. The resulting Patch.msp file was 40 KB. So what ...