System.Reflection.TargetInvocationException was unhandled
  HResult=-2146232828
  <...snip...>
       HResult=-2146233078
       Message=Achievement Files Have Been Tampered With.
       Source=AchievementService.Client
       StackTrace:
            at AchievementService.Client.AchievementClient. (String  )
            at AchievementService.Client.AchievementClient. (String  )
            at AchievementService.Client.AchievementClient.UnlockAchievement(String achievement)
            at Coding4Fun.VSAchievements.Core.AchievementManager.Unlock(IAchievementController controller)
            at Coding4Fun.VSAchievements.Core.AchievementManager.Coding4Fun.VSAchievements.Core.IAchievementServiceClient.Unlock(IAchievementController controller)
            at Coding4Fun.VSAchievements.FxCopAchievementRules.MoreThan30EnumFieldsAchievement.fxcop_AnalysisFinished(IFxCopAnalyzerContext obj)
            at System.Action`1.Invoke(T obj)
       InnerException:

What to do when this happens every time when building a solution (having a 30+ enum) in vs2012 RTM on win7?

Can I reset my achievement data?

Thanks!