If you didn't launch the game since then please go to %appdata%/SpaceEngineers/SpaceEngineers.log and look at the end, there should be an error there, paste it all.

If you did launch the game since then, use /ng create again to make it crash and paste that error.

i tryed that and it wont let me post it charater limit

2015-03-26 15:07:01.505 - Thread: 1 -> Exception occured: System.NullReferenceException: Object reference not set to an instance of an object.
at Digi.NaturalGravity.AddGravityPrefab(Vector3D position, Int32 radius, Single strength, Boolean sync)
at Digi.NaturalGravity.MessageEntered(String message, Boolean& visible)
at =wf2mAPt8CiioldadBcOu0W1T5z=.HandleInput(Boolean )
at Sandbox.Graphics.GUI.MyScreenManager.HandleInput()
at =cO5JxCxQ4id6vvVgNNQ3tPAM92=.HandleInput()
at =JbLZcQ0hj347engCZ44EtlRZjA=.Update()
at =f3Z6Ndh0u8AiCd1RYvZsU5Dv7T=.UpdateInternal()
at =cuDXH07IPdNc3nh2dfXC4sNbx5=.=v0NoMtrPy2fhNeFawOHPKRCSMn=.<Run>b__1()
at =mEhFnRRYUxEvoh0t4KZxxONkWU=.Run(=ikvYbcjVoXAAj7Kp0pbE1O7j9B= )
at =cuDXH07IPdNc3nh2dfXC4sNbx5=.Run(=ikvYbcjVoXAAj7Kp0pbE1O7j9B= )
at =JbLZcQ0hj347engCZ44EtlRZjA=.Run(Boolean , Action )
at Sandbox.AppCode.App.MyProgram.RunInternal(String[] args)
at Sandbox.AppCode.App.MyProgram.Main(String[] args)
2015-03-26 15:07:01.507 - Thread: 1 -> Hiding window
2015-03-26 15:07:01.973 - Thread: 1 -> Hiding window done
2015-03-26 15:07:01.973 - Thread: 1 -> Showing message

2015-03-26 15:54:59.670 - Thread: 1 -> Error: checksum of file 'C:\Program Files (x86)\Steam\steamapps\common\SpaceEngineers\Content\Models\Weapons\HandDrillSpikeMesh.mwm' failed 47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=
2015-03-26 15:55:01.269 - Thread: 1 -> MyGuiScreenBase.UnloadContent - START
2015-03-26 15:55:01.269 - Thread: 1 -> MyGuiScreenBase.UnloadContent - END
2015-03-26 15:55:15.612 - Thread: 1 -> Loading voxel storage from file 'C:\Program Files (x86)\Steam\steamapps\common\SpaceEngineers\Content\VoxelMaps\Arabian_Border_7.vx2'
2015-03-26 15:55:15.629 - Thread: 1 -> MyGuiScreenBase.UnloadContent - START
2015-03-26 15:55:15.629 - Thread: 1 -> MyGuiScreenBase.UnloadContent - END
2015-03-26 15:55:19.606 - Thread: 1 -> Error: checksum of file 'C:\Program Files (x86)\Steam\steamapps\common\SpaceEngineers\Content\Models\Debris\RockDebris01.mwm' failed 47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=
2015-03-26 15:55:19.660 - Thread: 1 -> MyParticlesLibrary.ctor - START
2015-03-26 15:55:19.885 - Thread: 1 -> Error: checksum of file 'C:\Program Files (x86)\Steam\steamapps\common\SpaceEngineers\Content\Particles\MyParticlesLibrary.mwl' failed 47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=
2015-03-26 15:55:19.885 - Thread: 1 -> MyParticlesLibrary.ctor - END
2015-03-26 15:55:23.393 - Thread: 1 -> MyGuiScreenChat.ctor START
2015-03-26 15:55:23.393 - Thread: 1 -> MyGuiScreenChat.ctor END
2015-03-26 15:55:27.104 - Thread: 1 -> Exception occured: System.NullReferenceException: Object reference not set to an instance of an object.
at Digi.NaturalGravity.AddGravityPrefab(Vector3D position, Int32 radius, Single strength, Boolean sync)
at Digi.NaturalGravity.MessageEntered(String message, Boolean& visible)
at =wf2mAPt8CiioldadBcOu0W1T5z=.HandleInput(Boolean )
at Sandbox.Graphics.GUI.MyScreenManager.HandleInput()
at =cO5JxCxQ4id6vvVgNNQ3tPAM92=.HandleInput()
at =JbLZcQ0hj347engCZ44EtlRZjA=.Update()
at =f3Z6Ndh0u8AiCd1RYvZsU5Dv7T=.UpdateInternal()
at =cuDXH07IPdNc3nh2dfXC4sNbx5=.=v0NoMtrPy2fhNeFawOHPKRCSMn=.<Run>b__1()
at =mEhFnRRYUxEvoh0t4KZxxONkWU=.Run(=ikvYbcjVoXAAj7Kp0pbE1O7j9B= )
at =cuDXH07IPdNc3nh2dfXC4sNbx5=.Run(=ikvYbcjVoXAAj7Kp0pbE1O7j9B= )
at =JbLZcQ0hj347engCZ44EtlRZjA=.Run(Boolean , Action )
at Sandbox.AppCode.App.MyProgram.RunInternal(String[] args)
at Sandbox.AppCode.App.MyProgram.Main(String[] args)
2015-03-26 15:55:27.106 - Thread: 1 -> Hiding window
2015-03-26 15:55:27.114 - Thread: 1 -> Network readers disposed
2015-03-26 15:55:27.488 - Thread: 1 -> Hiding window done
2015-03-26 15:55:27.488 - Thread: 1 -> Showing message


well atleast here is some of it

2015-03-27 14:20:42.540 - Thread: 1 -> Exception occured: System.NullReferenceException: Object reference not set to an instance of an object.
at Digi.NaturalGravity.AddGravityPrefab(Vector3D position, Int32 radius, Single strength, Boolean sync)
at Digi.NaturalGravity.MessageEntered(String message, Boolean& visible)
at Sandbox.ModAPI.MessageEnteredDel.Invoke(String messageText, Boolean& sendToOthers)
at =wf2mAPt8CiioldadBcOu0W1T5z=.HandleInput(Boolean )
at Sandbox.Graphics.GUI.MyScreenManager.HandleInput()
at =cO5JxCxQ4id6vvVgNNQ3tPAM92=.HandleInput()
at =JbLZcQ0hj347engCZ44EtlRZjA=.Update()
at =f3Z6Ndh0u8AiCd1RYvZsU5Dv7T=.UpdateInternal()
at =cuDXH07IPdNc3nh2dfXC4sNbx5=.=v0NoMtrPy2fhNeFawOHPKRCSMn=.<Run>b__1()
at =mEhFnRRYUxEvoh0t4KZxxONkWU=.Run(=ikvYbcjVoXAAj7Kp0pbE1O7j9B= )
at =cuDXH07IPdNc3nh2dfXC4sNbx5=.Run(=ikvYbcjVoXAAj7Kp0pbE1O7j9B= )
at =JbLZcQ0hj347engCZ44EtlRZjA=.Run(Boolean , Action )
at Sandbox.AppCode.App.MyProgram.RunInternal(String[] args)
at Sandbox.AppCode.App.MyProgram.Main(String[] args)
2015-03-27 14:20:42.542 - Thread: 1 -> Hiding window
2015-03-27 14:20:43.023 - Thread: 1 -> Hiding window done
2015-03-27 14:20:43.023 - Thread: 1 -> Showing message

They changed something on the game it seems, it's the same error for all you guys and I also replicated it on my side, I'll fix it :}

Ok, uploaded a fixed version.