If you're downloaded from the OP:
1. create 'Bullet' folder in your 'Documents' archive
2. create '3D少女カスタムエボリューション' folder in your 'Bullet' one [or rename the folder inside it - mine was a complete gibberish '{ƒ\ƒtƒgƒEƒFƒA‚Å‚ÍA‰¹º‚ÌĶ‚É']
3. create 'save' folder and 'settings.ini' use this inside your settings file:
[Setting]
ScreenW=1280
ScreenH=720
FullScreen=0
VoiceVol=3000
SEVol=3000
BGMVol=3000
And sorry that I could'nt help with the torrent version - did not have any torrent apps, so I could'nt actually try [been lazy too apparently (>_<)]
I followed every step here, and the game still refuses to save. What exactly did I do wrong? I've checked for misspellings and everything, yet nothing works.
Edit: so it turns out that this is only half right. The folder that needs to be generated on Documents is dependent on what the game files recognize it as. You have to basically force the game to give you a file in order to automatically generate the folder. A Snapshot is all you need for that. Just use the camera button and you're done. Instead of using "3D少女カスタムエボリューション" as the name for the folder, try "3DGirl". That was enough to fix it in my case. Maybe for others the name will be different. If it is gibberish, you should rename them. The same goes for mods.