diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/event/AccountLoadingEvent.java b/HMCL/src/main/java/org/jackhuang/hmcl/event/AccountLoadingEvent.java
index 1fc343485..02485fc97 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/event/AccountLoadingEvent.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/event/AccountLoadingEvent.java
@@ -17,6 +17,13 @@
  */
 package org.jackhuang.hmcl.event;
 
+import org.jackhuang.hmcl.auth.Account;
+import org.jackhuang.hmcl.setting.Profile;
+import org.jackhuang.hmcl.util.ToStringBuilder;
+
+import java.util.Collection;
+import java.util.Collections;
+
 /**
  * This event gets fired when loading accounts.
  * <br>
@@ -26,14 +33,29 @@ package org.jackhuang.hmcl.event;
  */
 public class AccountLoadingEvent extends Event {
 
+    private final Collection<Account> accounts;
+
     /**
      * Constructor.
      *
      * @param source {@link org.jackhuang.hmcl.setting.Settings}
      */
-    public AccountLoadingEvent(Object source) {
+    public AccountLoadingEvent(Object source, Collection<Account> accounts) {
         super(source);
+        this.accounts = Collections.unmodifiableCollection(accounts);
     }
 
+
+    public Collection<Account> getAccounts() {
+        return accounts;
+    }
+
+    @Override
+    public String toString() {
+        return new ToStringBuilder(this)
+                .append("source", source)
+                .append("accounts", accounts)
+                .toString();
+    }
 }
 
diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/event/OutOfDateEvent.java b/HMCL/src/main/java/org/jackhuang/hmcl/event/OutOfDateEvent.java
index 9f5d25840..fe6fbfd4b 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/event/OutOfDateEvent.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/event/OutOfDateEvent.java
@@ -17,6 +17,7 @@
  */
 package org.jackhuang.hmcl.event;
 
+import org.jackhuang.hmcl.util.ToStringBuilder;
 import org.jackhuang.hmcl.util.VersionNumber;
 
 /**
@@ -42,4 +43,11 @@ public final class OutOfDateEvent extends Event {
         return true;
     }
 
+    @Override
+    public String toString() {
+        return new ToStringBuilder(this)
+                .append("source", getSource())
+                .append("version", getVersion())
+                .toString();
+    }
 }
diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/event/ProfileChangedEvent.java b/HMCL/src/main/java/org/jackhuang/hmcl/event/ProfileChangedEvent.java
index 87d229e44..2155d94cc 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/event/ProfileChangedEvent.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/event/ProfileChangedEvent.java
@@ -18,6 +18,7 @@
 package org.jackhuang.hmcl.event;
 
 import org.jackhuang.hmcl.setting.Profile;
+import org.jackhuang.hmcl.util.ToStringBuilder;
 
 /**
  * This event gets fired when the selected profile changed.
@@ -44,4 +45,11 @@ public final class ProfileChangedEvent extends Event {
         return profile;
     }
 
+    @Override
+    public String toString() {
+        return new ToStringBuilder(this)
+                .append("source", source)
+                .append("profile", profile)
+                .toString();
+    }
 }
diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/event/ProfileLoadingEvent.java b/HMCL/src/main/java/org/jackhuang/hmcl/event/ProfileLoadingEvent.java
index f5ef78dc8..81ff05379 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/event/ProfileLoadingEvent.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/event/ProfileLoadingEvent.java
@@ -17,6 +17,12 @@
  */
 package org.jackhuang.hmcl.event;
 
+import org.jackhuang.hmcl.setting.Profile;
+import org.jackhuang.hmcl.util.ToStringBuilder;
+
+import java.util.Collection;
+import java.util.Collections;
+
 /**
  * This event gets fired when loading profiles.
  * <br>
@@ -26,14 +32,29 @@ package org.jackhuang.hmcl.event;
  */
 public class ProfileLoadingEvent extends Event {
 
+    private final Collection<Profile> profiles;
+
     /**
      * Constructor.
      *
      * @param source {@link org.jackhuang.hmcl.setting.Settings}
      */
-    public ProfileLoadingEvent(Object source) {
+    public ProfileLoadingEvent(Object source, Collection<Profile> profiles) {
         super(source);
+
+        this.profiles = Collections.unmodifiableCollection(profiles);
     }
 
+    public Collection<Profile> getProfiles() {
+        return profiles;
+    }
+
+    @Override
+    public String toString() {
+        return new ToStringBuilder(this)
+                .append("source", source)
+                .append("profiles", profiles)
+                .toString();
+    }
 }
 
diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/game/LauncherHelper.java b/HMCL/src/main/java/org/jackhuang/hmcl/game/LauncherHelper.java
index e16322193..2f5596e5d 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/game/LauncherHelper.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/game/LauncherHelper.java
@@ -50,7 +50,6 @@ public final class LauncherHelper {
     public static final LauncherHelper INSTANCE = new LauncherHelper();
     private LauncherHelper(){}
 
-    private TaskExecutor executor;
     public static final Queue<ManagedProcess> PROCESSES = new ConcurrentLinkedQueue<>();
     private final TaskExecutorDialogPane launchingStepsPane = new TaskExecutorDialogPane(() -> {});
 
@@ -78,7 +77,7 @@ public final class LauncherHelper {
         VersionSetting setting = profile.getVersionSetting(selectedVersion);
         Optional<String> gameVersion = GameVersion.minecraftVersion(repository.getVersionJar(version));
 
-        TaskExecutor executor = this.executor = Task.of(Schedulers.javafx(), () -> Controllers.dialog(launchingStepsPane))
+        TaskExecutor executor = Task.of(Schedulers.javafx(), () -> Controllers.dialog(launchingStepsPane))
                 .then(Task.of(Schedulers.javafx(), () -> emitStatus(LoadingState.DEPENDENCIES)))
                 .then(variables -> {
                     if (setting.isNotCheckGame())
@@ -162,8 +161,7 @@ public final class LauncherHelper {
                             Controllers.closeDialog();
                     });
                 }
-
-                LauncherHelper.this.executor = null;
+                launchingStepsPane.setExecutor(null);
             }
         });
 
diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/setting/Profile.java b/HMCL/src/main/java/org/jackhuang/hmcl/setting/Profile.java
index 4d56d93d6..6b7c4257b 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/setting/Profile.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/setting/Profile.java
@@ -24,6 +24,7 @@ import org.jackhuang.hmcl.game.HMCLGameRepository;
 import org.jackhuang.hmcl.mod.ModManager;
 import org.jackhuang.hmcl.util.ImmediateObjectProperty;
 import org.jackhuang.hmcl.util.ImmediateStringProperty;
+import org.jackhuang.hmcl.util.ToStringBuilder;
 
 import java.io.File;
 import java.lang.reflect.Type;
@@ -146,6 +147,14 @@ public final class Profile {
             vs.setUsesGlobal(true);
     }
 
+    @Override
+    public String toString() {
+        return new ToStringBuilder(this)
+                .append("gameDir", getGameDir())
+                .append("name", getName())
+                .toString();
+    }
+
     public void addPropertyChangedListener(InvalidationListener listener) {
         nameProperty.addListener(listener);
         globalProperty.addListener(listener);
diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/setting/Settings.java b/HMCL/src/main/java/org/jackhuang/hmcl/setting/Settings.java
index 9a8830b5b..584d2e6a5 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/setting/Settings.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/setting/Settings.java
@@ -535,7 +535,7 @@ public class Settings {
     }
 
     private void onProfileChanged() {
-        EventBus.EVENT_BUS.fireEvent(new ProfileChangedEvent(SETTINGS, getSelectedProfile()));
+        EventBus.EVENT_BUS.fireEvent(new ProfileChangedEvent(this, getSelectedProfile()));
         getSelectedProfile().getRepository().refreshVersionsAsync().start();
     }
 
@@ -548,11 +548,11 @@ public class Settings {
      * Invoked by loading GUI phase.
      */
     public void onProfileLoading() {
-        EventBus.EVENT_BUS.fireEvent(new ProfileLoadingEvent(SETTINGS));
+        EventBus.EVENT_BUS.fireEvent(new ProfileLoadingEvent(this, getProfiles()));
         onProfileChanged();
     }
 
     public void onAccountLoading() {
-        EventBus.EVENT_BUS.fireEvent(new AccountLoadingEvent(SETTINGS));
+        EventBus.EVENT_BUS.fireEvent(new AccountLoadingEvent(this, getAccounts()));
     }
 }
diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/ui/Decorator.java b/HMCL/src/main/java/org/jackhuang/hmcl/ui/Decorator.java
index 7867986b7..a903880e4 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/ui/Decorator.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/ui/Decorator.java
@@ -45,6 +45,7 @@ import javafx.scene.shape.Rectangle;
 import javafx.stage.Screen;
 import javafx.stage.Stage;
 import javafx.stage.StageStyle;
+import org.jackhuang.hmcl.Launcher;
 import org.jackhuang.hmcl.setting.EnumBackgroundImage;
 import org.jackhuang.hmcl.setting.Settings;
 import org.jackhuang.hmcl.setting.Theme;
@@ -140,7 +141,7 @@ public final class Decorator extends StackPane implements TaskExecutorDialogWiza
 
         FXUtils.loadFXML(this, "/assets/fxml/decorator.fxml");
 
-        onCloseButtonAction = new SimpleObjectProperty<>(this, "onCloseButtonAction", primaryStage::close);
+        onCloseButtonAction = new SimpleObjectProperty<>(this, "onCloseButtonAction", Launcher::stopApplication);
 
         primaryStage.initStyle(StageStyle.UNDECORATED);
         btnClose.setGraphic(close);
diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/TaskExecutorDialogPane.java b/HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/TaskExecutorDialogPane.java
index 249b4dd57..0038117a9 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/TaskExecutorDialogPane.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/ui/construct/TaskExecutorDialogPane.java
@@ -57,7 +57,9 @@ public class TaskExecutorDialogPane extends StackPane {
 
     public void setExecutor(TaskExecutor executor) {
         this.executor = executor;
-        taskListPane.setExecutor(executor);
+
+        if (executor != null)
+            taskListPane.setExecutor(executor);
     }
 
     public StringProperty titleProperty() {
diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/util/CrashReporter.java b/HMCL/src/main/java/org/jackhuang/hmcl/util/CrashReporter.java
index d4e673776..a02afc07b 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/util/CrashReporter.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/util/CrashReporter.java
@@ -37,6 +37,7 @@ public class CrashReporter implements Thread.UncaughtExceptionHandler {
     private static final HashMap<String, String> SOURCE = new HashMap<String, String>() {
         {
             put("javafx.fxml.LoadException", Launcher.i18n("crash.NoClassDefFound"));
+            put("Location is not set", Launcher.i18n("crash.NoClassDefFound"));
             put("UnsatisfiedLinkError", Launcher.i18n("crash.user_fault"));
             put("java.lang.NoClassDefFoundError", Launcher.i18n("crash.NoClassDefFound"));
             put("java.lang.VerifyError", Launcher.i18n("crash.NoClassDefFound"));
diff --git a/HMCLCore/src/main/java/org/jackhuang/hmcl/auth/Account.java b/HMCLCore/src/main/java/org/jackhuang/hmcl/auth/Account.java
index 9bc41f637..389a64d1f 100644
--- a/HMCLCore/src/main/java/org/jackhuang/hmcl/auth/Account.java
+++ b/HMCLCore/src/main/java/org/jackhuang/hmcl/auth/Account.java
@@ -17,6 +17,8 @@
  */
 package org.jackhuang.hmcl.auth;
 
+import org.jackhuang.hmcl.util.ToStringBuilder;
+
 import java.util.Map;
 import java.util.UUID;
 
@@ -64,4 +66,13 @@ public abstract class Account {
     public abstract Map<Object, Object> toStorage();
 
     public abstract void clearCache();
+
+    @Override
+    public String toString() {
+        return new ToStringBuilder(this)
+                .append("username", getUsername())
+                .append("character", getCharacter())
+                .append("uuid", getUUID())
+                .toString();
+    }
 }