File list (Check if you may need any files):
USB Device - Bootloaders\Vendor Class - MCHPUSB Bootloader\Bootloader - PC Software\Readme.txt
........................\.................................\.............Firmware for PIC18F4550 Family Devices\18f4550.lkr
........................\.................................\...................................................\boot.c
........................\.................................\...................................................\boot.h
........................\.................................\...................................................\Bootloader_18f4550.lkr
........................\.................................\...................................................\CleanUp.bat
........................\.................................\...................................................\interrupt.c
........................\.................................\...................................................\interrupt.h
........................\.................................\...................................................\io_cfg.h
........................\.................................\...................................................\main.c
........................\.................................\...................................................\MCHPUSB.mcp
........................\.................................\...................................................\MCHPUSB.mcw
........................\.................................\...................................................\typedefs.h
........................\.................................\...................................................\usb.h
........................\.................................\...................................................\usb9.c
........................\.................................\...................................................\usb9.h
........................\.................................\...................................................\usbcfg.h
........................\.................................\...................................................\usbctrltrf.c
........................\.................................\...................................................\usbctrltrf.h
........................\.................................\...................................................\usbdefs_ep0_buff.h
........................\.................................\...................................................\usbdefs_std_dsc.h
........................\.................................\...................................................\usbdrv.c
........................\.................................\...................................................\usbdrv.h
........................\.................................\...................................................\usbdsc.c
........................\.................................\...................................................\usbdsc.h
........................\.................................\...................................................\usbmmap.c
........................\.................................\...................................................\usbmmap.h
........................\.................................\...................................................\usb_compile_time_validation.h
........................\HID - Bootloader\HID Bootloader for PIC24FJ256GB110 Family Devices.hex
........................\................\HIDBootLoader.exe
........................\................\IMPORTANT README.txt
........................\................\USB Device - HID - HID Bootloader - C18 - PIC18F14K50.hex
........................\................\USB Device - HID - HID Bootloader - C18 - PIC18F4450.hex
........................\................\USB Device - HID - HID Bootloader - C18 - PIC18F4550.hex
........................\................\USB Device - HID - HID Bootloader - C18 - PIC18F46J50 PIM.hex
........................\................\USB Device - HID - HID Boot