This is the entire contents of BL.ini.  Like any Windows INI file, it is divided into sections whose names are surrounded in square brackets.  BL.ini has sections called [General], [Targets], and [Known Devices].

The [Known Devices] section contains information about the PIC processors that the BLPro.exe program can work with.  This first Alpha version only supports the 18F4550 and 18F2550 devices. 

The TargetID item in the [General] section indicates that the device to be upgraded (reprogrammed) is expected to be an 18F2550 device, because the TargetID=0x0092 value matches the value of DeviceID01, the Device ID that is hard-wired into the 18F2550 processor.