File list (Check if you may need any files):
button_demo
...........\common
...........\......\application.h
...........\......\radio.c
...........\......\radio.h
...........\nrf24le1
...........\........\build
...........\........\.....\button_demo_nrf24le1.plg
...........\........\button_demo
...........\........\button_demo.lnp
...........\........\button_demo.M51
...........\........\button_demo.Opt
...........\........\button_demo.plg
...........\........\button_demo.Uv2
...........\........\button_demo_Opt.Bak
...........\........\button_demo_Uv2.Bak
...........\........\hex-files
...........\........\.........\button_demo_nrf24le1.hex
...........\........\.........\keil_version.txt
...........\........\lst
...........\........\...\hal_nrf.lst
...........\........\...\hal_nrf_hw.lst
...........\........\...\main.lst
...........\........\...\radio.lst
...........\........\main.c
...........\........\STARTUP.A51
...........\........\STARTUP.LST
...........\........\STARTUP.OBJ
...........\nrf24lu1p
...........\.........\button_demo.Uv2
...........\.........\hex-files
...........\.........\.........\button_demo_nrf24lu1p.hex
...........\.........\.........\keil_version.txt
...........\.........\main.c