I use the SD card method and force the update with a debug file on card. As far as I'm aware, the upgrade finishes successfully, but the camera firmware stays the same.
log file attached, its the only one on the card
[00007103]Delete history success.
[00007410]========== remo-con disconnect. boot(15) ============
[00007479]Packet [C:\WM610_FW_V01.11.01.50.bin] detected, card sn [0x176d3e29].
[00007549]Packet upgrade start...
[00007616]Packet checking...
[00007701]Packet vlink 01.11.0150 <-> 01.11.0150.
[00007772]Done.
[00007840]Version checking[1]...
[00007908][04 00][00] v1.30.1.43 -> v1.30.1.43 need upgrade.
[00008000][08 00][00] v2.14.9.42 -> v2.14.9.42 need upgrade.
[00008070][01 00][00] v2.70.5440 -> v2.70.5440 need upgrade
[00008137][01 01][00] v2.70.5440 -> v2.70.5440 need upgrade
[00008237][03 05][00] v34.1.0.5 -> v34.1.0.5 need upgrade.
[00008338][03 06][00] v2.4.20.50 -> v2.4.20.50 need upgrade.
[00008457][05 00][00] v3.0.6.2 -> v3.0.6.2 need upgrade.
[00008536][09 00][00] v5.0.0.0 -> v5.0.0.0 need upgrade.
[00008658][11 00][00] v3.9.0.0 -> v3.9.0.0 need upgrade.
[00008777][12 00][00] v1.11.0.0 -> v1.11.0.0 need upgrade.
[00008898][12 01][00] v1.11.0.0 -> v1.11.0.0 need upgrade.
[00009038][12 02][00] v1.11.0.0 -> v1.11.0.0 need upgrade.
[00009157][12 03][00] v1.11.0.0 -> v1.11.0.0 need upgrade.
[00009270][15 00][00] v1.1.2.0 -> v1.1.2.0 need upgrade.
[00009358][17 00][00] v1.1.0.8 -> v1.1.0.8 need upgrade.
[00009477][17 01][00] v2.0.1.6 -> v2.0.1.6 need upgrade.
[00009572][19 00][00] v1.0.8.96 -> v1.0.8.96 need upgrade.
[00009641]Done.
[00011724]Waiting for user confirm...
[00021790]Timeout, start upgrade automatically.
[00021912]Firmware upgrading[1]...
[00027865][01 00] Firmware upgrade start...
[00006299][01 00] Firmware upgrade finished successfully.
[00006362]Done.
[00006426]Packet [C:\WM610_FW_V01.11.01.50.bin] resumed, card sn [0x176d3e29].
[00006521]Packet vlink 01.11.0150 <-> 01.11.0150.
[00006590]Version checking[2]...
[00006666][04 00][00] v1.30.1.43 -> v1.30.1.43 need upgrade.
[00006737][08 00][00] v2.14.9.42 -> v2.14.9.42 need upgrade.
[00006808][01 00][05] v2.70.5440 -> v2.70.5440 need upgrade
[00006871][01 01][00] v2.70.5440 -> v2.70.5440 need upgrade
[00007151][03 05][00] v34.1.0.5 -> v34.1.0.5 need upgrade.
[00007303][03 06][00] v2.4.20.50 -> v2.4.20.50 need upgrade.
[00007443][05 00][00] v3.0.6.2 -> v3.0.6.2 need upgrade.
[00007542][09 00][00] v5.0.0.0 -> v5.0.0.0 need upgrade.
[00007691][11 00][00] v3.9.0.0 -> v3.9.0.0 need upgrade.
[00007824][12 00][00] v1.11.0.0 -> v1.11.0.0 need upgrade.
[00007991][12 01][00] v1.11.0.0 -> v1.11.0.0 need upgrade.
[00008143][12 02][00] v1.11.0.0 -> v1.11.0.0 need upgrade.
[00008291][12 03][00] v1.11.0.0 -> v1.11.0.0 need upgrade.
[00009954][15 00][00] v1.1.2.0 -> v1.1.2.0 need upgrade.
[00010064][17 00][00] v1.1.0.8 -> v1.1.0.8 need upgrade.
[00010223][17 01][00] v2.0.1.6 -> v2.0.1.6 need upgrade.
[00010338][19 00][00] v1.0.8.96 -> v1.0.8.96 need upgrade.
[00010422]Done.
[00010504]Firmware upgrading[2]...
[00010649][01 01] Firmware upgrade start...
[00020956][01 01] Firmware upgrade finished successfully.
[00021700][08 00] Firmware upgrade start...
[00484657][08 00] Firmware upgrade finished successfully.
[00484749][12 00] Firmware upgrade start...
[00522112][12 00] Firmware upgrade finished successfully.
[00522201][12 01] Firmware upgrade start...
[00557691][12 01] Firmware upgrade finished successfully.
[00557779][12 02] Firmware upgrade start...
[00592826][12 02] Firmware upgrade finished successfully.
[00592913][12 03] Firmware upgrade start...
[00628422][12 03] Firmware upgrade finished successfully.
[00628514][03 05] Firmware upgrade start...
[00664299][03 05] Firmware upgrade finished successfully.
[00664493][03 06] Firmware upgrade start...
[00908836][03 06] Firmware upgrade finished successfully.
[00908937][17 00] Firmware upgrade start...
[00950713][17 00] Firmware upgrade finished successfully.
[00950802][17 01] Firmware upgrade start...
[00984550][17 01] Firmware upgrade finished successfully.
[00984638][11 00] Firmware upgrade start...
[01018409][11 00] Firmware upgrade finish failed (step = 4, err = 0xf4, idx = 57, los = 1, ng = 29).
[01028615][05 00] Firmware upgrade start...
[01052785][05 00] Firmware upgrade finished successfully.
[01052868][15 00] Firmware upgrade start...
[01071344][15 00] Firmware upgrade finished successfully.
[01073918][19 00] Firmware upgrade start...
[01226465][19 00] Firmware upgrade finished successfully.
[01226553][09 00] Firmware upgrade start...
[01262579][09 00] Firmware upgrade finished successfully.
[01262687][04 00] Firmware upgrade start...
[01322499][04 00] Firmware upgrade finished successfully.
[01322580]Done.
[01322661]Version checking[3]...
[01322766][04 00][05] v1.30.1.43 -> v1.30.1.43 need upgrade.
[01322867][08 00][05] v2.14.9.42 -> v2.14.9.42 need upgrade.
[01322950][01 00][05] v2.70.5440 -> v2.70.5440 need upgrade
[01323034][01 01][05] v2.70.5440 -> v2.70.5440 need upgrade
[01323152][03 05][05] v34.1.0.5 -> v34.1.0.5 need upgrade.
[01323272][03 06][05] v2.4.20.50 -> v2.4.20.50 need upgrade.
[01323392][05 00][05] v3.0.6.2 -> v3.0.6.2 need upgrade.
[01323492][09 00][05] v5.0.0.0 -> v5.0.0.0 need upgrade.
[01323612][11 00][00] v0.0.0.0 -> v3.9.0.0 need upgrade.
[01323752][12 00][05] v1.11.0.0 -> v1.11.0.0 need upgrade.
[01323913][12 01][05] v1.11.0.0 -> v1.11.0.0 need upgrade.
[01324053][12 02][05] v1.11.0.0 -> v1.11.0.0 need upgrade.
[01324193][12 03][05] v1.11.0.0 -> v1.11.0.0 need upgrade.
[01324386][15 00][05] v1.1.2.0 -> v1.1.2.0 need upgrade.
[01324513][17 00][05] v1.1.0.8 -> v1.1.0.8 need upgrade.
[01324652][17 01][05] v2.0.1.6 -> v2.0.1.6 need upgrade.
[01324748][19 00][05] v1.0.8.96 -> v1.0.8.96 need upgrade.
[01324829]Done.
[01324913]Firmware upgrading[3]...
[01325005][11 00] Firmware upgrade start...
[01392130][11 00] Firmware upgrade finished successfully.
[01392210]Done.
[01392294]Version checking[4]...
[01392379][04 00][05] v1.30.1.43 -> v1.30.1.43 need upgrade.
[01392481][08 00][05] v2.14.9.42 -> v2.14.9.42 need upgrade.
[01392570][01 00][05] v2.70.5440 -> v2.70.5440 need upgrade
[01392726][01 01][05] v2.70.5440 -> v2.70.5440 need upgrade
[01392846][03 05][05] v34.1.0.5 -> v34.1.0.5 need upgrade.
[01392946][03 06][05] v2.4.20.50 -> v2.4.20.50 need upgrade.
[01393066][05 00][05] v3.0.6.2 -> v3.0.6.2 need upgrade.
[01393162][09 00][05] v5.0.0.0 -> v5.0.0.0 need upgrade.
[01393326][11 00][05] v3.9.0.0 -> v3.9.0.0 need upgrade.
[01393469][12 00][05] v1.11.0.0 -> v1.11.0.0 need upgrade.
[01393606][12 01][05] v1.11.0.0 -> v1.11.0.0 need upgrade.
[01393745][12 02][05] v1.11.0.0 -> v1.11.0.0 need upgrade.
[01393885][12 03][05] v1.11.0.0 -> v1.11.0.0 need upgrade.
[01394028][15 00][05] v1.1.2.0 -> v1.1.2.0 need upgrade.
[01394146][17 00][05] v1.1.0.8 -> v1.1.0.8 need upgrade.
[01394306][17 01][05] v2.0.1.6 -> v2.0.1.6 need upgrade.
[01394396][19 00][05] v1.0.8.96 -> v1.0.8.96 need upgrade.
[01394475]Packet upgrade finish successfully.