Hier mal mein Errorlog, nachdem das Spiel abgestürzt ist.
Zu den Hintergründen, ich habe versucht meine Welten auf den neuesten Stand zu bringen, also upzudaten, da nach einer Information,
die Welten nach einer gewissen Zeit, ohne dass sie regelmäßig geupdated werden, zerstört werden, bzw. wird also nicht mehr konvertiert,
d. h. nicht mehr spielbar sein. 
Das dauert ewig immer von einer Map auf die nächte zu wechseln, immer Ladekringel, lso Wechsel Welt ins Hauptmenu, dauert ewig. 
Ich spreche von Singleplayerwelten, nicht von Multiplayer.
Report of 2016/09/21 04:35 PM by Deirdre Version: 0.7.2.7_30 (Steamversion)
OS: Windows 10 (x64) Version: 10.0 Java version: 1.8.0_91 JVM architecture: amd64
CPU: [GenuineIntel, Intel(R) Core(TM) i7-3770 CPU @ 3.40GHz, 4, 8] (Cores: 
Mainboard: [Acer, Predator G3620]
GraphicsAdapter: [NVIDIA, NVIDIA GeForce GTX 1070, 20160825000000.000000-000, 21.21.13.7270, nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um,nvwgf2um]
Total Systemmemory: 34297 MB
JVM Memory used: 903,07 MB reserved: 2133,17 MB max: 16707,48 MB
ARGS -H: 16000 -D: 16000
/////////////////////////////////////////////////////////////////////////////////
Existing buffers: 462085
(b: 120983 f: 227779 i: 1002 s: 112321 d: 0)
Total heap memory held: 881899kb
Total direct memory held: 768222kb
(b: 587830kb f: 149634kb i: 16019kb s: 14736kb d: 0kb)
/////////////////////////////////////////////////////////////////////////////////
Settings:
Resolution: 1920x1053 (Windowed)
Frequency: 60 Vsync: off
DepthBits: 24
BitsPerPixel: 32
Samples: 1
MaxFrames: 200
Anisotropic: 16
ViewDistance: 21 (LOD: 50)
LS(Q)/AO/REF/GM/WP/WR/INST: 1(110)/1/1/1/1/1/1/////////////////////////////////////////////////////////////////////////////////
Graphics: GeForce GTX 1070/PCIe/SSE2 Vendor: NVIDIA Corporation OpenGL version: 4.5.0 NVIDIA 372.70
Accelerated Memory: Indeterminate
GLMaxTextureSize: 32768
GLMaxTextureImageUnits: 32
GLMaxArrayTextureLayers: 35071
GLMaxVertexTextureImageUnits: 32
GLMaxVertexUniforms: 4096
GLMaxFragmentUniforms: 4096
GLMaxVaryingFloats: 124
GLMaxVertexAttribs: 16
Capabilities: [FrameBuffer, FrameBufferMRT, FrameBufferMultisample, TextureMultisample, OpenGL20, OpenGL21, OpenGL30, OpenGL31, OpenGL32, OpenGL33, OpenGL40, GLSL100, GLSL110, GLSL120, GLSL130, GLSL140, GLSL150, GLSL330, GLSL400, VertexTextureFetch, GeometryShader, TesselationShader, TextureArray, TextureBuffer, FloatTexture, FloatColorBuffer, FloatDepthBuffer, PackedFloatTexture, SharedExponentTexture, PackedFloatColorBuffer, NonPowerOfTwoTextures, MeshInstancing, VertexBufferArray, Multisample, PackedDepthStencilBuffer, Srgb, FrameBufferBlit, TextureCompressionS3TC, TextureFilterAnisotropic, TextureCompressionETC1, TextureCompressionETC2, DepthTexture, IntegerIndexBuffer, SeamlessCubemap, BinaryShader]
/////////////////////////////////////////////////////////////////////////////////
Sounddrivers:
(0) Lautsprecher (Logitech G930 Gaming Headset), 7POINT1, 8, 48000
(1) 2D FHD LG TV-8 (NVIDIA High Definition Audio), STEREO, 2, 48000
(2) HP w2207-4 (NVIDIA High Definition Audio), STEREO, 2, 48000
(3) Lautsprecher (Realtek High Definition Audio), 5POINT1, 6, 48000
/////////////////////////////////////////////////////////////////////////////////
Camera location: (0.0, 1.36125, 0.0) Camera rotation: (0.0, 0.0, 0.0, 1.0)
Total running time: 1844.2429 IngameState: false Avg. Fps: 29
/////////////////////////////////////////////////////////////////////////////////
F:/SteamLibrary/steamapps/common/RisingWorld/risingworld.jar (efa031925caafeabde2f3d5981bdcc70)
F:/SteamLibrary/steamapps/common/RisingWorld/core/jbullet.jar (6c76c153d9e916fe2ccca3c22d404129)
F:/SteamLibrary/steamapps/common/RisingWorld/core/jinput.jar (a0be2ae778b2f5d70d554c27d381dbcb)
F:/SteamLibrary/steamapps/common/RisingWorld/core/jinput-natives-linux.jar (0fae8f38711ae22308aaa47624b03691)
F:/SteamLibrary/steamapps/common/RisingWorld/core/jinput-natives-osx.jar (d56527074b3cb6f5f37eed6feaf42414)
F:/SteamLibrary/steamapps/common/RisingWorld/core/jinput-natives-windows.jar (ad8ac871336d6c386f131cf3ac99ddc8)
F:/SteamLibrary/steamapps/common/RisingWorld/core/jme3-core.jar (f372b84ef8978cb3cf3006509861e79e)
F:/SteamLibrary/steamapps/common/RisingWorld/core/jme3-desktop.jar (ae7e7d39b4d986a183cfcc55ac8293f6)
F:/SteamLibrary/steamapps/common/RisingWorld/core/jme3-effects.jar (1b6120bb1384e0b7e9a3616dec063340)
F:/SteamLibrary/steamapps/common/RisingWorld/core/jme3-jbullet.jar (f004ecc970d1be60197115b062e3b01f)
F:/SteamLibrary/steamapps/common/RisingWorld/core/jme3-lwjgl.jar (b810837411ce9676b7f7987bb9cc4052)
F:/SteamLibrary/steamapps/common/RisingWorld/core/jutils.jar (6b3285be8cbfdd0e8db706c6c994c0b9)
F:/SteamLibrary/steamapps/common/RisingWorld/core/lwjgl.jar (2ad1b1df0582c3b485f8cf7f10e3dcb1)
F:/SteamLibrary/steamapps/common/RisingWorld/core/lwjgl-natives-linux.jar (f829980d5628a32be0c3883205a817c3)
F:/SteamLibrary/steamapps/common/RisingWorld/core/lwjgl-natives-osx.jar (fbdf0fe173b29523aafacb7a6e0633c6)
F:/SteamLibrary/steamapps/common/RisingWorld/core/lwjgl-natives-windows.jar (8a2ad7ae35b81621979435716368be8f)
F:/SteamLibrary/steamapps/common/RisingWorld/core/stack-alloc.jar (13242768bfac6e72b5f08201d605ff39)
F:/SteamLibrary/steamapps/common/RisingWorld/core/vecmath.jar (abb54a743934f7177748d360a7b77fc4)
F:/SteamLibrary/steamapps/common/RisingWorld/data/server.jar (502523c63c0f9fe55792bedfb45f0918)
F:/SteamLibrary/steamapps/common/RisingWorld/data/commons.jar (16b750a98abbac4d42ccca5dc29f73ca)
F:/SteamLibrary/steamapps/common/RisingWorld/data/jiw/apigility.jar (47306752172835c8242897e21d129bfa)
F:/SteamLibrary/steamapps/common/RisingWorld/data/jiw/java-fmod.jar (6a521c676039a1b3ebaeaa86464d0f52)
F:/SteamLibrary/steamapps/common/RisingWorld/data/jiw/java-fmod-natives.jar (c3e4152f3d16266cbf0b7189dc447bd7)
F:/SteamLibrary/steamapps/common/RisingWorld/data/jiw/jiw-gui.jar (1d501d1f1ecb099fa2f230967d45ca14)
F:/SteamLibrary/steamapps/common/RisingWorld/data/jiw/jiw-network.jar (e70dff2b6a5180a9fbbdabd9560838ab)
F:/SteamLibrary/steamapps/common/RisingWorld/data/jiw/vertx-client.jar (4e451f6094a199d43df72d0785ae7e70)
F:/SteamLibrary/steamapps/common/RisingWorld/data/jiw/plugin-api.jar (e4f4df1ff52560b17ad4c31b5211fa62)
F:/SteamLibrary/steamapps/common/RisingWorld/data/jiw/rcon.jar (a3e2095e95a8cd606a3af7fea69d80e1)
F:/SteamLibrary/steamapps/common/RisingWorld/lib/steamworks4j.jar (9282ea2e748a51f63300fb217279483b)
F:/SteamLibrary/steamapps/common/RisingWorld/lib/steamworks4j-natives.jar (2837b2e0c42b925041db99fd1021ea6d)
F:/SteamLibrary/steamapps/common/RisingWorld/lib/snakeyaml.jar (6bedeeed26844c401db1a5f53f880de5)
F:/SteamLibrary/steamapps/common/RisingWorld/lib/sqlite-jdbc.jar (5fa420d75512d78ba9b08143ddca61b7)
F:/SteamLibrary/steamapps/common/RisingWorld/lib/netty.jar (59dd19032d8c837f94cef3da06ad8264)
F:/SteamLibrary/steamapps/common/RisingWorld/lib/javax-json.jar (569870f975deeeb6691fcb9bc02a9555)
F:/SteamLibrary/steamapps/common/RisingWorld/lib/luaj.jar (35b99210e527b306ca52158f1479894d)
F:/SteamLibrary/steamapps/common/RisingWorld/data/assets/interface.jar (3764ccda7c39f20221533ad33eec5d95)
F:/SteamLibrary/steamapps/common/RisingWorld/data/assets/materials.jar (acc394288dfddf365377cef275624145)
F:/SteamLibrary/steamapps/common/RisingWorld/data/assets/models.jar (ea5799cbb5bf48845f765fffa16b4695)
F:/SteamLibrary/steamapps/common/RisingWorld/data/assets/textures.jar (aaffe1598c9ab8fb9c10ed9a41bfe633)
/////////////////////////////////////////////////////////////////////////////////
Error details:
Uncaught exception thrown in Thread[jME3 Main,5,main]
java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
at java.util.ArrayList$Itr.next(Unknown Source)
at de.jiw.gui.core.Screen.setResolution(Screen.java:277)
at content.Game.reshape(SourceFile:1052)
at com.jme3.system.lwjgl.LwjglDisplay.runLoop(LwjglDisplay.java:189)
at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:233)
at java.lang.Thread.run(Unknown Source)
