YouTrack Startup Error on Windows 7 After Fresh Install

I am attempting to try out YouTrack before installing it on a dedicated server.  I've installed it twice on my local Windows 7 system, once using port 80, the other time using port 9080 (uninstalled first before re-installing).  Both times I receive a 500 error and stack trace when loading the initial screen.  Seems root cause is "Could not find or create guest user".  Any ideas?

HTTP Status 500 -


type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception
java.lang.RuntimeException: Could not find or create guest user
    jetbrains.charisma.event.RefactoringMigrateHistoryToEvents$OldHistoryIssueChangeHandler.<init>(RefactoringMigrateHistoryToEvents.java:688)
    jetbrains.charisma.event.RefactoringMigrateHistoryToEvents.processHistoryItemQueue(RefactoringMigrateHistoryToEvents.java:436)
    jetbrains.charisma.event.RefactoringMigrateHistoryToEvents.migrateOldHistoryToEvents(RefactoringMigrateHistoryToEvents.java:94)
    jetbrains.charisma.event.RefactoringMigrateHistoryToEvents.apply(RefactoringMigrateHistoryToEvents.java:76)
    jetbrains.charisma.refactoring.Refactoring.applyRefactoring(Refactoring.java:106)
    jetbrains.charisma.refactoring.Refactoring.access$000(Refactoring.java:21)
    jetbrains.charisma.refactoring.Refactoring$2.visit(Refactoring.java:72)
    jetbrains.charisma.refactoring.Refactoring$2.visit(Refactoring.java:70)
    jetbrains.mps.internal.collections.runtime.IVisitor.invoke(IVisitor.java:14)
    jetbrains.mps.internal.collections.runtime.IterableUtils.visitAll(IterableUtils.java:17)
    jetbrains.mps.internal.collections.runtime.Sequence.visitAll(Sequence.java:85)
    jetbrains.charisma.refactoring.Refactoring.applyAll(Refactoring.java:70)
    jetbrains.charisma.main.YouTrackInit.init(YouTrackInit.java:89)
    jetbrains.charisma.main.InitWebApplicationServiceLocatorListener.onAfterInit(InitWebApplicationServiceLocatorListener.java:9)
    jetbrains.springframework.configuration.runtime.ServiceLocator.fireLocalAfterInit(ServiceLocator.java:112)
    jetbrains.charisma.main.ServletImpl.init(ServletImpl.java:70)
    javax.servlet.GenericServlet.init(GenericServlet.java:212)
    org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:859)
    org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:579)
    org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555)
    java.lang.Thread.run(Unknown Source)