Hi Jason, Thanks for coming back. I have resolved the issue after downloading hiscore.dat file for mame220. For people who might be running mameui64, here it goes: There should be a folder named "hi" in the main installation directory, for example in my case H:\Games\Arcade Games\MAMEUI64\hi . You need to download the hiscore.dat file from https://highscore.mameworld.info/. You need to place your hiscore.dat in "hi" folder. Next step is to open mame.ini file and enable plugins, for example
#
# CORE SEARCH PATH OPTIONS
#
pluginspath plugins
Then you need to put this config below in the same mame.ini
#
# CORE MISC OPTIONS
plugins 1
plugin hiscore
I hope it will resolve the issue for anyone having trouble uploading the high scores to launchbox database. Now I need to go and enjoy myself.