Ok so, I've tried downloading the Autocart mod several times, it didn't work. I followed the instructions, downloaded the files several times, nothing's worked. On top of that, I can't open my options menu in Minecraft anymore. When I try to, the game freezes and crashes. I tried uninstalling all of my Minecraft folders so I could redownload it, but it always says that another program is running the files or something.
@Kazeto- Thanks. That got it working again. And yeah, I know it said that, but I thought the second update fixed that or something. I guess I was just really wanting it to work. ._. Still, thanks though.
So, any ideas on how to fix this?