diff --git a/src/main/kotlin/org/domaframework/doma/intellij/common/helper/ActiveProjectHelper.kt b/src/main/kotlin/org/domaframework/doma/intellij/common/helper/ActiveProjectHelper.kt
index e3b92342..ddb8761f 100644
--- a/src/main/kotlin/org/domaframework/doma/intellij/common/helper/ActiveProjectHelper.kt
+++ b/src/main/kotlin/org/domaframework/doma/intellij/common/helper/ActiveProjectHelper.kt
@@ -15,6 +15,7 @@
  */
 package org.domaframework.doma.intellij.common.helper
 
+import com.intellij.openapi.application.ApplicationManager
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.project.ProjectManager
 import com.intellij.openapi.wm.IdeFocusManager
@@ -22,27 +23,50 @@ import com.intellij.openapi.wm.IdeFocusManager
 object ActiveProjectHelper {
     private var activeProject: Project? = null
 
+    /**
+     * Sets the current active project.
+     *
+     * @param value the project to set as active, or null to clear
+     */
     fun setCurrentActiveProject(value: Project?) {
         activeProject = value
     }
 
+    /**
+     * Returns the current active project.
+     *
+     * If called from the EDT, tries to get the project with UI focus.
+     * Otherwise, returns the first open project or the last set active project.
+     *
+     * @return the current active [Project], or null if none is available
+     */
     fun getCurrentActiveProject(): Project? {
-        val initProject = activeProject
-        val active = getActiveUIProject()
-        return active ?: initProject
+        // If EDT, get from focus
+        if (ApplicationManager.getApplication().isDispatchThread) {
+            getActiveUIProject()?.let { return it }
+        }
+        // If not EDT, the top of openProjects
+        ProjectManager
+            .getInstance()
+            .openProjects
+            .firstOrNull()
+            ?.let { return it }
+
+        return activeProject
     }
 
+    /**
+     * Returns the project that currently has UI focus, if any.
+     *
+     * @return the [Project] with UI focus, or null if none
+     */
     private fun getActiveUIProject(): Project? {
         val openProjects: Array<out Project> = ProjectManager.getInstance().openProjects
-        var active: Project? = null
-
         for (project in openProjects) {
             if (IdeFocusManager.getInstance(project).focusOwner != null) {
-                active = project
-                break
+                return project
             }
         }
-
-        return active
+        return null
     }
 }
diff --git a/src/main/kotlin/org/domaframework/doma/intellij/setting/DomaToolsConfigurable.kt b/src/main/kotlin/org/domaframework/doma/intellij/setting/DomaToolsConfigurable.kt
index 5b277da0..62b14464 100644
--- a/src/main/kotlin/org/domaframework/doma/intellij/setting/DomaToolsConfigurable.kt
+++ b/src/main/kotlin/org/domaframework/doma/intellij/setting/DomaToolsConfigurable.kt
@@ -17,25 +17,37 @@ package org.domaframework.doma.intellij.setting
 
 import com.intellij.openapi.options.Configurable
 import com.intellij.openapi.options.ConfigurationException
+import com.intellij.util.ui.UIUtil.setEnabledRecursively
 import org.domaframework.doma.intellij.common.helper.ActiveProjectHelper
 import org.domaframework.doma.intellij.setting.state.DomaToolsFormatEnableSettings
 import javax.swing.JComponent
 
 class DomaToolsConfigurable : Configurable {
     private var mySettingsComponent: SettingComponent? = SettingComponent()
-    private val project = ActiveProjectHelper.getCurrentActiveProject()
 
     private var formatSettings: DomaToolsFormatEnableSettings? = null
 
-    init {
-        project?.let {
-            formatSettings = DomaToolsFormatEnableSettings.getInstance(it)
-        }
-    }
-
     override fun getDisplayName(): String = "Doma Tools"
 
-    override fun createComponent(): JComponent? = mySettingsComponent?.panel
+    /**
+     * Creates and returns the settings panel component.
+     *
+     * Gets the current active project and initializes the settings panel.
+     * If no project is active, the panel will be disabled.
+     * Loads both format settings and custom function settings for the active project.
+     *
+     * @return The settings panel component, or null if creation fails
+     */
+    override fun createComponent(): JComponent? {
+        val project = ActiveProjectHelper.getCurrentActiveProject()
+        val panel = mySettingsComponent?.panel ?: return null
+        if (project == null) {
+            setEnabledRecursively(panel, false)
+            return null
+        }
+        formatSettings = DomaToolsFormatEnableSettings.getInstance(project)
+        return panel
+    }
 
     override fun isModified(): Boolean {
         val enableFormatModified = formatSettings?.isModified(mySettingsComponent) != false