Thanks it worked apparently!
I haven't made a big score but the log says it would have loaded it if worth
RACE: working directory: C:\Users\matte\LaunchBox
TRACE: hiscore.dat: C:\Users\matte\Documents\Mame\plugins\hiscore\hiscore.dat
TRACE: game high score: C:\Users\matte\Documents\Mame\hi\timeplt.hi
TRACE: game detected: timeplt
TRACE: potential file containing hiscore: C:\Users\matte\Documents\Mame\hi\timeplt.hi
TRACE: reading a description from file: C:\Users\matte\LaunchBox\ThirdParty\hi2txt\hi2txt.zip, entry timeplt.xml
TRACE: reading dtd from file: C:\Users\matte\LaunchBox\ThirdParty\hi2txt\hi2txt.zip, entry hi2txt.dtd
TRACE: format defined: +1
TRACE: format auto: hexadecimal_string
TRACE: charset defined: timeplt
TRACE: charset defined: CS_NUMBER
TRACE: matching structure: hiscore.dat = ab08:28:00:f1a98b:3:00:01
TRACE: matching structure: size = 43
TRACE: data taken from file: C:\Users\matte\Documents\Mame\hi\timeplt.hi
TRACE: structure loop elt (index=0): RANK (1 bytes read on 43)
TRACE: structure loop elt (index=0): SCORE (4 bytes read on 43)
TRACE: structure loop elt (index=0): NAME (7 bytes read on 43)
TRACE: structure loop elt (index=0): UNKNOWN (8 bytes read on 43)
TRACE: structure loop elt (index=1): RANK (9 bytes read on 43)
TRACE: structure loop elt (index=1): SCORE (12 bytes read on 43)
TRACE: structure loop elt (index=1): NAME (15 bytes read on 43)
TRACE: structure loop elt (index=1): UNKNOWN (16 bytes read on 43)
TRACE: structure loop elt (index=2): RANK (17 bytes read on 43)
TRACE: structure loop elt (index=2): SCORE (20 bytes read on 43)
TRACE: structure loop elt (index=2): NAME (23 bytes read on 43)
TRACE: structure loop elt (index=2): UNKNOWN (24 bytes read on 43)
TRACE: structure loop elt (index=3): RANK (25 bytes read on 43)
TRACE: structure loop elt (index=3): SCORE (28 bytes read on 43)
TRACE: structure loop elt (index=3): NAME (31 bytes read on 43)
TRACE: structure loop elt (index=3): UNKNOWN (32 bytes read on 43)
TRACE: structure loop elt (index=4): RANK (33 bytes read on 43)
TRACE: structure loop elt (index=4): SCORE (36 bytes read on 43)
TRACE: structure loop elt (index=4): NAME (39 bytes read on 43)
TRACE: structure loop elt (index=4): UNKNOWN (40 bytes read on 43)
TRACE: structure simple elt: TOP SCORE (43 bytes read on 43)
TRACE: output selected: the 1st one
TRACE: data displayed into:
TRACE: output table field: RANK
TRACE: output table field: SCORE
TRACE: output table field: NAME
TRACE: output table field: UNKNOWN
TRACE: output field: TOP SCORE
RANK|SCORE|NAME
1|47900|MJB
2|27000|MJB
3|10000|K.O
4|8800|N.A
5|8460|M.I
2021-01-08 09:55:39 AM MameHighScores.Parse: No new scores found to upload!
2021-01-08 09:55:39 AM GameDetailsViewModel AttachView LoadVideoMusic Start
2021-01-08 09:55:39 AM Music.Play Start
2021-01-08 09:55:39 AM GameDetailsViewModel AttachView LoadVideoMusic Comple