Download this: http://tools.bemaniso.ws/bemanitools-4.20.zip
Unzip files. Locate iidx 19, unzip and copy all files within the folder.
Paste and replace the files within the Lincle HDD folder.
Configure your button layout with config.bat . Don't bother with the card/e-amuse tab.
This game, at least for now, needs to be played in "offline" mode. To do this change:
1 to 0 in prop/ea3-config.xml (line 371)
Don't forget to run gamestart.bat as admin.