Hey, so after being accepted, I logged on after 5 hours or so, but upon log in, i remembered i hadn't deleted/exported my mods. I quickly exited, moved them to a seperate folder, and retried. Starbound booted, I attempted to log, and it gave me a fatal error and crashed. Same with singleplayer. D: HELP!
Obviously, one of your mods has content that without the mod in your folder is preventing you from going on that toon. Identify and remove the mod items from your toon and you should be fine.
Toon means characters. You'll need to add the mods back in, login with your character, remove the mod items from them, then remove the mods. Or start a new character with the mods uninstalled (if possible)
Can you give us a error log? Pretty sure it should be called starbound.log, and it should be in the the main starbound folder. Open up the file in notepad and copy and paste the entire log in a spoiler. This /may/ make it easier to help you.