Version 0.246 is not removing nag screens for me.
Edit: Things I've tried to make it working:
- Removed the Launchbox Running Script for nag screens
- Deleted the -skip_gameinfo command-line
- Edited the mame.ini (skip_gameinfo line can be found under CORE MISC OPTIONS)
- Turned On "Skip game information screen" under Miscellaneous options in MAME's General options
No luck.