Error message: Error during dispatching of java.awt.event.InvocationEvent[INVOCATION_DEFAULT,runnable=com.yourkit.idea45Plugin.b$3@1d32c54,notifier=java.awt.EventQueue$1AWTInvocationLock@1037619,catchExceptions=true,when=1106679667086] on sun.awt.windows.WToolkit@3e9f53
java.lang.NoSuchMethodError: com.intellij.openapi.fileEditor.OpenFileDescriptor.<init>(Lcom/intellij/openapi/vfs/VirtualFile;I)V
at com.yourkit.idea45Plugin.b$3.run(a:10)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:171)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:454)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:139)
at com.intellij.ide.IdeEventQueue.a(IdeEventQueue.java:45)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:67)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:145)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:137)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:100)
There's another problem with the latest IDEA EAP builds: It doesn't show the YourKit-settings for run configurations. The tab "Startup/Connection" as it appears in 4.5.x is missing. My personal bet is that this is a problem of IDEA, but you might want to investigate this.
IDEA API was indeed broken (or silently changed - as you like ).
The next build 520 will contain a fix for this problem. It will also fix the problem with absent "Startup/Connection" tab in IDEA's "Run/Debug Configurations" dialog (the reason was again the changes in IDEA's open API).