File list (Check if you may need any files):
GUI
...\AT89X52.h
...\C51GUI.Opt
...\C51GUI.plg
...\C51GUI.Uv2
...\C51GUI_Opt.Bak
...\C51GUI_Uv2.Bak
...\config.h
...\ConvertColor.c
...\ConvertColor.h
...\delay.c
...\delay.h
...\FONT24_32.C
...\FONT24_32.H
...\font5_7.c
...\font5_7.h
...\FONT8_8.C
...\FONT8_8.H
...\FONT_MACRO.H
...\GUI_BASIC.C
...\GUI_BASIC.H
...\GUI_CONFIG.H
...\GUI_StockC.C
...\GUI_StockC.h
...\Last Loaded ucOS51.DBK
...\Last Loaded ZLGGUI51.DBK
...\lcmdrv.c
...\lcmdrv.h
...\loadbit.c
...\Loadbit.h
...\LST
...\...\C51GUI.m51
...\...\ConvertColor.lst
...\...\delay.lst
...\...\FONT24_32.lst
...\...\font5_7.lst
...\...\FONT8_8.lst
...\...\GUI_BASIC.lst
...\...\GUI_StockC.lst
...\...\lcmdrv.lst
...\...\loadbit.lst
...\...\main.lst
...\...\menu.lst
...\...\spline.lst
...\...\windows.lst
...\main.c
...\menu.c
...\menu.h
...\OBJ
...\...\C51GUI
...\...\C51GUI.hex
...\...\C51GUI.lnp
...\...\C51GUI.plg
...\...\ConvertColor.obj
...\...\delay.obj
...\...\FONT24_32.obj
...\...\font5_7.obj
...\...\FONT8_8.obj
...\...\GUI_BASIC.obj
...\...\GUI_StockC.obj
...\...\lcmdrv.obj
...\...\loadbit.obj
...\...\main.obj
...\...\menu.obj
...\...\spline.obj
...\...\windows.obj
...\spline.c
...\spline.h
...\ucOS51.PWI
...\windows.c
...\windows.h
...\ZLGGUI51.DSN
...\ZLGGUI51.PWI
...\_desktop.ini