diff --git a/components/WindowManager.vue b/components/WindowManager.vue
index 103cc67..ddbda58 100644
--- a/components/WindowManager.vue
+++ b/components/WindowManager.vue
@@ -1,62 +1,19 @@
 <script setup lang="ts">
-	import { computed } from 'vue'
-	import { useWMStore, INewWindow, IWindow, IWindowType } from '~~/store/wm'
+	import { computed, ConcreteComponent, ComputedOptions, MethodOptions } from 'vue'
+	import { useWMStore, windowTypes } from '~~/store/wm'
 	import { VicavWinBox } from "./VicavWinBox.client"
 
 	const wmStore = useWMStore()
 	const windowList = computed(() => wmStore.windowList)
-	const windowTypes = {
-		Text: {
-			component: resolveComponent('Text'),
-		} as IWindowType,
-		WMap: {
-			component: resolveComponent('WMap'),
-		} as IWindowType,
-		DictQuery: {
-			component: resolveComponent('DictQuery'),
-		} as IWindowType,
-		DictEntry: {
-			component: resolveComponent('DictEntry'),
-		} as IWindowType,
-	}
-
-	const newWindow = computed(() => wmStore.newWindow)
-	watch(newWindow, (window) => {
-		if (window != null) {
-			createNewWindow(window)
-		}
-	})
-	function createNewWindow(newWindow: INewWindow) {
-		let windowType = windowTypes[newWindow.windowTypeId as keyof typeof windowTypes]
-		if (windowType === undefined) {
-			consoleWarning("Window type undefined", newWindow)
-			return false
-		}
-		if (typeof windowType.component === "string") {
-			consoleWarning("Window type '" + windowType + "' was not resolved", newWindow)
-			return false
-		}
 
-		let windowClasses = [ 'wb-vicav', 'no-min', 'no-max', 'no-full', 'no-resize', 'no-move']
-		if (!!newWindow.params?.customClass) {
-			windowClasses.push(newWindow.params.customClass)
-		}
-		let window: IWindow = {
-			id: newWindow.id,
-			ref: null,
-			type: windowType as IWindowType,
-			winBoxOptions: {
-				title: '[' + newWindow.windowTypeId + '] ' + newWindow.title,
-				top: wmStore.topMargin,
-				class: windowClasses,
-			},
-			params: newWindow.params,
-		}
-
-		wmStore.addWindowToList(window)
-	}
-	function consoleWarning(text: string, data: Object) {
-		console.warn("WindowManager:", text, data);
+	/* nuxt cannot resolve components from variables in setup, see https://github.com/nuxt/nuxt/issues/14036 */
+	/* otherwise this block could be deleted and only window.type be passed on to the component in the :is */
+	type ContentComponents = {[key: string]: string | ConcreteComponent<{}, any, any, ComputedOptions, MethodOptions>}
+	const contentComponents: ContentComponents = {
+		Text: resolveComponent('Text'),
+		WMap: resolveComponent('WMap'),
+		DictQuery: resolveComponent('DictQuery'),
+		DictEntry: resolveComponent('DictQuery'),
 	}
 
 	function registerWindowRef(i: number, ref: any) {
@@ -87,7 +44,7 @@
 			@close="removeWindowRef(i, $event)"
 		>
 			<component
-				:is="{...window.type.component}"
+				:is="contentComponents[window.type]"
 				:params="window.params"
 			/>
 		</VicavWinBox>
diff --git a/store/wm.ts b/store/wm.ts
index 654c16c..f77607d 100644
--- a/store/wm.ts
+++ b/store/wm.ts
@@ -19,23 +19,47 @@ export const useWMStore = defineStore(
 		const windowMarginPx = ref(5) // must be in sync with css class .wb-vicav in WindowManager.vue
 		const counter = ref(0)
 		const windowList = ref([] as IWindow[])
-		const newWindow = ref(null as INewWindow|null)
 
 		const open = (windowTypeId: string, windowTitle: string, params: Object|null) => {
-			newWindow.value = { id: counter.value++, title: windowTitle, windowTypeId, params }
-			nextTick(() => {
-				newWindow.value = null
-			})
-		}
+			let windowType: WindowType
+			try {
+				windowType = validateWindowType(windowTypeId)
+			} catch (error: Error) {
+				console.warn("WindowManager: " + error.message)
+				return
+			}
+
+			let windowClasses = [ 'wb-vicav', 'no-min', 'no-max', 'no-full', 'no-resize', 'no-move']
+			if (!!params?.customClass) {
+				windowClasses.push(params.customClass)
+			}
+			let newWindow: IWindow = {
+				id: counter.value++,
+				ref: null,
+				type: windowType,
+				winBoxOptions: {
+					title: '[' + windowTypeId + '] ' + windowTitle,
+					top: topMargin,
+					class: windowClasses,
+				},
+				params: params,
+			}
 
-		const addWindowToList = (window: IWindow) => {
-			window.winBoxOptions.index = windowList.value.length > 0
+			newWindow.winBoxOptions.index = windowList.value.length > 0
 				? Math.max(...windowList.value.map(w => parseInt(w.ref.index))) + 1
 				: 1000
-			windowList.value.push(window)
+			windowList.value.push(newWindow)
 			arrangeWindows()
 		}
 
+		const validateWindowType = (windowTypeId: string): WindowType => {
+			const windowType = windowTypes.find(t => t === windowTypeId)
+			if (windowType) {
+				return windowType
+			}
+			throw new Error("Window type '" + windowTypeId + "' unknown")
+		}
+
 		const registerWindowRef = (i: number, ref: HTMLElement) => {
 			windowList.value[i].ref = ref
 		}
@@ -245,9 +269,7 @@ export const useWMStore = defineStore(
 			registerClientSize,
 
 			windowList,
-			newWindow,
 			open,
-			addWindowToList,
 			registerWindowRef,
 			removeWindowRef,
 			focus,
@@ -266,21 +288,13 @@ export const useWMStore = defineStore(
 	}
 )
 
-export interface INewWindow {
-	id: number,
-	title: string,
-	windowTypeId: string,
-	params: Object|null,
-}
-
-export interface IWindowType {
-	component: ConcreteComponent<{}, any, any, ComputedOptions, MethodOptions>,
-}
+export const windowTypes = ['Text', 'WMap', 'DictQuery', 'DictEntry'] as const
+export type WindowType = typeof windowTypes[number]
 
 export interface IWindow {
 	id: number | null
 	ref: any
-	type: IWindowType
+	type: WindowType
 	winBoxOptions: any
 	params: Object|null
 }