The command line program flirc_util.exe doesn't work on windows 11:
C:\Program Files (x86)\Flirc>flirc_util.exe version
3.26.5
[E] lib/libtransport/transport.c _dev_send_cmd(223): Wrong response: 'ir_state'
[E] lib/libtransport/hid.c hid_recv_packet(167): hid_recv_packet: wrong report id
[E] lib/libtransport/hid.c hid_recv_packet(168): hidapi: (null)
[E] lib/libtransport/transport.c _recv_packet(126): _recv_packet: recv packet error = -1
[E] lib/libtransport/transport.c _dev_send_cmd(201): recv timeout
[E] lib/libtransport/hid.c hid_recv_packet(167): hid_recv_packet: wrong report id
[E] lib/libtransport/hid.c hid_recv_packet(168): hidapi: (null)
[E] lib/libtransport/transport.c _recv_packet(126): _recv_packet: recv packet error = -1
[E] lib/libtransport/transport.c _dev_send_cmd(201): recv timeout
FW Version: v1.9.61-1-g4b35b71
[E] lib/libtransport/transport.c _dev_send_cmd(223): Wrong response: 'getversion'
[E] lib/libflirc/firmware/fw_4.0.c fl_ver4_header_peek(50): invalid address you idiot
[E] lib/libtransport/transport.c _dev_send_cmd(223): Wrong response: 'getversion'
[E] lib/libflirc/firmware/fw_4.0.c fl_ver4_header_peek(50): invalid address you idiot
[E] lib/libtransport/hid.c hid_recv_packet(167): hid_recv_packet: wrong report id
[E] lib/libtransport/hid.c hid_recv_packet(168): hidapi: (null)
[E] lib/libtransport/transport.c _recv_packet(126): _recv_packet: recv packet error = -1
[E] lib/libtransport/transport.c _dev_send_cmd(201): recv timeout
[E] lib/libflirc/firmware/fw_4.0.c fl_ver4_header_peek(50): invalid address you idiot
[E] lib/libtransport/transport.c _dev_send_cmd(223): Wrong response: 'ir_state'
[E] lib/libflirc/firmware/fw_4.0.c fl_ver4_header_peek(50): invalid address you idiot
[E] lib/libtransport/hid.c hid_recv_packet(167): hid_recv_packet: wrong report id
[E] lib/libtransport/hid.c hid_recv_packet(168): hidapi: (null)
[E] lib/libtransport/transport.c _recv_packet(126): _recv_packet: recv packet error = -1
[E] lib/libtransport/transport.c _dev_send_cmd(201): recv timeout
[E] lib/libtransport/transport.c _dev_send_cmd(223): Wrong response: 'h_peek'
[E] lib/libtransport/transport.c _dev_send_cmd(223): Wrong response: 'h_peek'
Hash: 0x00000001
The GUI seems to work (v3.26.5) and gen 2 flirc firmware v4.9.61