Got Artemis connected, got the latest mod folder, the latest SegaTools, everything seems fine, but it always gets stuck right here:
Aグループの基準機から設定を取得
Reads "Obtain settings from the reference machine in group A"
edit: ope, looks like this was covered in the 1.39 guide:
(F1 into system menu -> go to 6th setting from the top -> top setting, originally "A" -> set to "OFF")
Just adding that as this is in neither of the ReadMe and is kind of a gotcha if you're starting from 1.45
https://www.emuline.org/topic/3580-setting-up-ongeki-139/