我使用新的 SDK 工具（修订版 23）更新了 Eclipse，但现在当 Eclipse 启动时，我收到错误消息：

此 Android SDK 需要 Android Developer Toolkit 版本 23.0.0 或更高版本。当前版本是
22.6.3.v201404151837-1123206。请将 ADT 更新到最新版本。

使用 “检查更新”未 找到更新。如果我尝试 “安装新软件” ，我可以看到版本 23，但由于以下错误，我无法升级：

Cannot complete the install because of a conflicting dependency.
Software being installed: Android Development Tools 23.0.0.1245622 (com.android.ide.eclipse.adt.feature.feature.group 23.0.0.1245622)
Software currently installed: Android Developer Tools 22.2.1.v201309180102-833290 (com.android.ide.eclipse.adt.package.product 22.2.1.v201309180102-833290)
Only one of the following can be installed at once: 
    ADT Package 22.6.3.v201404151837-1123206 (com.android.ide.eclipse.adt.package 22.6.3.v201404151837-1123206)
    ADT Package 23.0.0.1245622 (com.android.ide.eclipse.adt.package 23.0.0.1245622)
Cannot satisfy dependency:
    From: Android Development Tools 23.0.0.1245622 (com.android.ide.eclipse.adt.feature.feature.group 23.0.0.1245622)
    To: com.android.ide.eclipse.adt.package [23.0.0.1245622]
Cannot satisfy dependency:
    From: Android Development Tools 22.6.3.v201404151837-1123206 (com.android.ide.eclipse.adt.feature.group 22.6.3.v201404151837-1123206)
    To: com.android.ide.eclipse.adt.package [22.6.3.v201404151837-1123206]
Cannot satisfy dependency:
    From: ADT Package 22.2.1.v201309180102-833290 (com.android.ide.eclipse.adt.package.feature.group 22.2.1.v201309180102-833290)
    To: com.android.ide.eclipse.adt.feature.group 22.2.0
Cannot satisfy dependency:
    From: Android Developer Tools 22.2.1.v201309180102-833290 (com.android.ide.eclipse.adt.package.product 22.2.1.v201309180102-833290)
    To: com.android.ide.eclipse.adt.package.feature.group [22.2.1.v201309180102-833290]

从网站下载最后一个 ADT 后，似乎还有另一个问题。

使用 SDK 工具修订版。23 proguard未安装，文件夹SDKdir/tools/proguard丢失，其他工具丢失。这个版本包含几个错误。