Nevermind. Worked fine, thank you very much!!

this did not work either, I still cannot enter retroarch menu.
I am using a Xbox Controller.

this is the retroarchcustom.cfg.origin:
core_options_path = /recalbox/share/system/configs/retroarch/cores/retroarch-core-options.cfg

system_directory = /recalbox/share/bios/

config_save_on_exit = false

video_threaded = true

#aspect_ratio_index = "21"
video_aspect_ratio_auto = true

rewind_enable = false
rewind_buffer_size = 10
rewind_granularity = 2

video_gpu_screenshot = true

video_shader_enable = false
video_smooth = true

savestate_auto_save = false
savestate_auto_load = false

video_shader_dir = /recalbox/share_init/shaders/
screenshot_directory = /recalbox/share/screenshots/
savestate_directory = /recalbox/share/saves/
savefile_directory = /recalbox/share/saves/
extraction_directory = /recalbox/share/extractions/
cheat_database_path = /recalbox/share_init/cheats/cht/
cheat_settings_path = /recalbox/share/cheats/saves/

fastforward_ratio = -1.0
input_autodetect_enable = false

joypad_autoconfig_dir = /recalbox/share/system/configs/retroarch/inputs/

input_joypad_driver = "sdl2"

input_player1_analog_dpad_mode = "1"
input_player2_analog_dpad_mode = "1"
input_player3_analog_dpad_mode = "1"
input_player4_analog_dpad_mode = "1"

input_enable_hotkey_btn = "16"

input_enable_hotkey = "escape"
input_exit_emulator = "escape"

and my default input cfg:

input_device = "PS3CONTROLLERNAME"
input_driver = "udev"
input_b_btn = "14"
input_y_btn = "15"
input_select_btn = "0"
input_start_btn = "3"
input_up_btn = "4"
input_down_btn = "6"
input_left_btn = "7"
input_right_btn = "5"
input_a_btn = "13"
input_x_btn = "12"
input_l_btn = "10"
input_r_btn = "11"
input_l2_btn = "8"
input_r2_btn = "9"
input_l3_btn = "1"
input_r3_btn = "2"
input_l_x_plus_axis = "+0"
input_l_x_minus_axis = "-0"
input_l_y_plus_axis = "+1"
input_l_y_minus_axis = "-1"
input_r_x_plus_axis = "+2"
input_r_x_minus_axis = "-2"
input_r_y_plus_axis = "+3"
input_r_y_minus_axis = "-3"

input_analog_dpad_mode = "1"

input_menu_toggle_btn = "3"
input_exit_emulator_btn = "0"
input_load_state_btn = "12"
input_save_state_btn = "15"
input_state_slot_increase_btn = "5"
input_state_slot_decrease_btn = "7"
input_screenshot_btn = "8"
input_hold_fast_forward_axis = "+2"
input_rewind_axis = "-2"

Hello,
i completely messed up my retroarch input configuration. Is there a way to reset it?