ROMs not scanning

I’m using Windows 10 x64 with RetroArch downloaded last night.

When I try to add games, only some of them get added to the Content. For example, only two or three of my Sega Genesis games appear in the list, my one Sega CD image doesn’t appear, I can’t get the last Nintendo DS Castlevania game to appear (either through scanning the folder or manually scanning the ROM through “Load Content”, and a few Gameboy/Color games aren’t listing. How do I get them to scan?

Someone had a similar issue and resolved it in this thread:

http://libretro.com/forums/showthread.php?t=5712&highlight=terminator

H:\Emulation\gen\Lunar - Eternal Blue (U).cue
Lunar: Eternal Blue
DETECT
DETECT
00000000|crc
Lunar.lpl
H:\Emulation\gen\Lunar - Eternal Blue (U).cue
Lunar: Eternal Blue
DETECT
DETECT
00000000|crc
Lunar.lpl

I tried this in a blank playlist and neither entry worked; they only loaded an empty black screen.

There’s a currently a bug whereby DOS-style carriage-returns break the playlists in unexpected ways. You can try something like dos2unix to convert it:

It turned out that each thing was something else I was configuring wrong or doing wrong in RA, though the playlist thing did get me to make a playlist. Now my problem is I’m trying to figure out how the “quick swap” mode works in Nintendo DS screen settings. How do I swap screens without re-entering the menu?