[HELP] 'Can't use mkvmerge without knowing it's version!' error when adding a job to queue

[Selur]

Strange.
Try resetting your tool versions ("Config->Tools->Clear all cached tool infos"), restart Hybrid and call check the detected tool versions (Config->Tools->Tool Versions).
I get:

Known tool versions:
  aomenc: 2.0.0-1066-g3698bf87b (default)
  avs2yuv: 0.24bm6
  avs2yuv64: 0.28
  AVSMeter: 3.0.6.0
  AVSMeter64: 3.0.6.0
  bdsup2sub++: 1.03
  Cuda H.264: no version info
  dcaenc: Unknown
  delaycut: 1.439
  DivX265: 1.5.0.8
  faac: 1.30
  fdkaac: 1.0.1
  ffmpeg: N-100125-ge857e427c1-g052b4c3481+4
  ffmpeg_32: N-100124-g12ca98f17c-g052b4c3481+3
  fhgaacenc: 20120806
  flac: c - Command-line FLAC encoder/decoder version 1.3.3
  flaccl: 2.1.7
  FLVExtractCL: 1.6.2
  kvazaar: 2.0.0-44-gd4341b3a 2020-11-18
  lame: 3.100
  lsdvd: no version info
  MediaInfo: 20.09
  mencoder: 38179
  mencoder_32: 38179
  mkvextract: 51.0.0
  mkvinfo: 51.0.0
  mkvmerge: 51.0.0
  MP4Box: 1.1.0-DEV-rev289-g71af72386-ab-suite
  mp4fpsmod: 0.26
  mplayer: 38164
  mplayer_32: 38164
  mpv: no version info
  mpv_32: no version info
  neroAacEnc: 1.5.4.0
  NVEnc: 5.21
  NVEnc (FFmpeg): no version info
  oggenc: 1.4.0
  opusenc: 0.2-20-gae5d6d5
  qaac: 2.71
  QSVEnc: no version info
  rav1e: 0.4.0-alpha (release)
  sox: 14.4.2
  SVT-HEVC: 1.5.0
  telxcc: 2.6.0
  tsMuxeR: e347781
  VCEEnc: no version info
  vpxenc: 1.9.0-122-gebac57ce9
  vStripFree: 0.8e
  wine: no version info
  x264: 3027
  x265: 3.4+27-g5163c32d7
and
[code]
General infos:
  CUDA: false
  .Net 4+: true
  Avisnyth: true
     SubTile: true
     DGDecNV: true
     VFW decoders: vidc.cvid, vidc.i420, vidc.iyuv, vidc.mrle, vidc.msvc, vidc.uyvy, vidc.yuy2, vidc.yvu9, vidc.yvyu
  Disable tsMuxeR support: false
  FFmpeg supports:
     audio filter: false
     UT Video: true
     Lib UT Video: false
     Avisynth: true
     FAAC: false
     FDKAac: false
     Lame: true
     LibAss: false
     Dcadec: false
     LibBluray: true
     Vorbis: true
     ProRes support old: false
  MPlayer/Mencode supports:
     FAAC: false
     FDKAac: false
     Lame: false
     LAVC: false
     LibBluray: false
  MKVToolNix supports:
     HEVC (ROVI): false
  VPXEnc supports:
     VP9: true
     High bit depth: true
  x264 supports:
     --fade-compensate X: false
     --opencl: true
     Lavf: true
  FAAC supports:
     mp4support: false
  NVEnc supports:
     h264_MAXB_4;h264_RCM_63;h264_FC;h264_QP;h264_BDM_1;h264_TL_4;h264_MAXL_62;h264_MINL_10;h264_444;h264_MAXW_4096;h264_MAXH_4096;h264_DYNR;h264_DYNB;h264_CQP;h264_SUBRB;h264_CONST;h264_IRE;h264_VBV;h264_SLICE;h264_REF;h264_ASYN;h264_MAXMB_65536;h264_MAXMBPS_-318179578;h264_LOSS;h264_LOOK;h264_CABAC;h264_AQT;h264_BREF_1;h265_MAXB_0;h265_RCM_63;h265_FC;h265_QP;h265_BDM_0;h265_TL_0;h265_MAXL_186;h265_MINL_30;h265_444;h265_MAXW_8192;h265_MAXH_8192;h265_DYNR;h265_DYNB;h265_CQP;h265_SUBRB;h265_CONST;h265_IRE;h265_VBV;h265_SLICE;h265_REF;h265_ASYN;h265_MAXMB_262144;h265_MAXMBPS_0;h265_SAO;h265_MEO;h265_LOSS;h265_LOOK;h265_10BIT;h265_BREF_1;VERSION_5.21;API_11

Cu Selur