[16:55:06] [AWT-EventQueue-0/INFO] Start generating launching command...
[16:55:06] [Game Launcher/INFO] Building process
[16:55:06] [Game Launcher/INFO] Logging in...
[16:55:06] [Game Launcher/INFO] Detecting libraries...
[16:55:06] [Game Launcher/ERROR]
---- Hello Minecraft! Crash Report ----
  Version: 2.4.2.63
  Time: 2016-07-10 16:55:06
  Thread: Thread[Game Launcher,6,main]

  Content:
    java.lang.NullPointerException

    at org.jackhuang.hellominecraft.launcher.core.version.MinecraftLibrary.getDownloadInfo(MinecraftLibrary.java:142)

    at org.jackhuang.hellominecraft.launcher.core.download.MinecraftDownloadService.getDownloadLibraries(MinecraftDownloadService.java:60)

    at org.jackhuang.hellominecraft.launcher.core.launch.GameLauncher.makeLaunchCommand(GameLauncher.java:102)

    at org.jackhuang.hellominecraft.launcher.util.HMCLGameLauncher$1.run(HMCLGameLauncher.java:88)



-- System Details --
  Operating System: Windows 10 (amd64), 10.0
  Java Version: 1.8.0_60, Oracle Corporation
  Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation

换旧版HMCL或其他启动器。
还有，系统盘全盘搜索.HMCL，搜到后把内部的jar文件统统删掉。

附上地址：http://pan.baidu.com/s/1dFwkLSt

没搜到有jar格式的文件啊

那直接换旧版HMCL试试，不行的话换启动器。

换了旧版提示还是原来的 如果换小黑头启动器点了启动之后没有游戏弹出

墙裂建议换BMCL和BakaXL

换了BMCL后的提示是
BMCL,4.1.4.1700
mscorlib
System.ArgumentNullException: 键不能为 null。
参数名: key
   在 System.Collections.Hashtable.ContainsKey(Object key)
   在 System.Windows.ResourceDictionary.Contains(Object key)
   在 BMCLV2.I18N.LangManager.GetLangFromResource(String key)
   在 BMCLV2.Windows.FrmMain.<btnStart_Click>d__14.MoveNext()
--- 引发异常的上一位置中堆栈跟踪的末尾 ---
   在 System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.<ThrowAsync>b__6_0(Object state)
   在 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   在 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
键不能为 null。
参数名: key
Key:System.Object
Value:
   在 System.Collections.Hashtable.ContainsKey(Object key)
   在 System.Windows.ResourceDictionary.Contains(Object key)
   在 BMCLV2.I18N.LangManager.GetLangFromResource(String key)
   在 BMCLV2.Windows.FrmMain.<btnStart_Click>d__14.MoveNext()
--- 引发异常的上一位置中堆栈跟踪的末尾 ---
   在 System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.<ThrowAsync>b__6_0(Object state)
   在 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   在 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)


-----------------BMCL LOG----------------------

07/10/2016 17:30:55信息:BMCL V3 Ver.4.1.4.1700正在启动
07/10/2016 17:30:55信息:加载C:\Users\asus\Desktop\1\bmcl.xml文件
07/10/2016 17:30:55信息:Javaw: C:\Program Files\Java\jre7\bin\javaw.exe, Username: !!!, Javaxmx: 4096, Login: 啥都没有, LastPlayVer: , ExtraJvmArg:  -Dfml.ignoreInvalidMinecraftCertificates=true -Dfml.ignorePatchDiscrepancies=true, Lang: zh-cn, Passwd: System.Byte[], Autostart: False, Report: True, CheckUpdate: True, WindowTransparency: 1, DownloadSource: 0, PluginConfig: System.Collections.Generic.Dictionary`2[System.String,System.Object], Height: -1, Width: -1, FullScreen: False
07/10/2016 17:30:55信息:加载默认配置
07/10/2016 17:30:55信息:无需更新
07/10/2016 17:31:04信息:正在启动,使用的登陆方式为离线模式
07/10/2016 17:31:05错误:BMCL,4.1.4.1700
mscorlib
System.ArgumentNullException: 键不能为 null。
参数名: key
   在 System.Collections.Hashtable.ContainsKey(Object key)
   在 System.Windows.ResourceDictionary.Contains(Object key)
   在 BMCLV2.I18N.LangManager.GetLangFromResource(String key)
   在 BMCLV2.Windows.FrmMain.<btnStart_Click>d__14.MoveNext()
--- 引发异常的上一位置中堆栈跟踪的末尾 ---
   在 System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.<ThrowAsync>b__6_0(Object state)
   在 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   在 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)
键不能为 null。
参数名: key
Key:System.Object
Value:
   在 System.Collections.Hashtable.ContainsKey(Object key)
   在 System.Windows.ResourceDictionary.Contains(Object key)
   在 BMCLV2.I18N.LangManager.GetLangFromResource(String key)
   在 BMCLV2.Windows.FrmMain.<btnStart_Click>d__14.MoveNext()
--- 引发异常的上一位置中堆栈跟踪的末尾 ---
   在 System.Runtime.CompilerServices.AsyncMethodBuilderCore.<>c.<ThrowAsync>b__6_0(Object state)
   在 System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
   在 System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

换个java版本试试

我是启动器问题，启动器不知道怎么要让我下载2.5的，我啥也没点就更新了，用旧的启动器也不行。
[21:02:20] [AWT-EventQueue-0/INFO] Start generating launching command...
[21:02:21] [Game Launcher/INFO] Building process
[21:02:21] [Game Launcher/INFO] Logging in...
[21:02:21] [Game Launcher/INFO] Detecting libraries...
[21:02:21] [Game Launcher/ERROR]
---- Hello Minecraft! Crash Report ----
  Version: 2.5.0.65
  Time: 2016-07-11 21:02:21
  Thread: Thread[Game Launcher,6,main]

  Content:
    java.lang.NullPointerException

    at org.jackhuang.hellominecraft.launcher.core.version.MinecraftLibrary.getDownloadInfo(MinecraftLibrary.java:142)

    at org.jackhuang.hellominecraft.launcher.core.download.MinecraftDownloadService.getDownloadLibraries(MinecraftDownloadService.java:60)

    at org.jackhuang.hellominecraft.launcher.core.launch.GameLauncher.makeLaunchCommand(GameLauncher.java:102)

    at org.jackhuang.hellominecraft.launcher.util.HMCLGameLauncher$1.run(HMCLGameLauncher.java:88)



-- System Details --
  Operating System: Windows 7 (x86), 6.1
  Java Version: 1.8.0_92, Oracle Corporation
  Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation

进不去了，就一直错误。

在C盘中打开 用户-用户名-AppData-Roaming  
删除.HMCL文件
之后下载旧版HMCL试试
旧版HMCL上面貌似有人发过了
这里