diff --git a/src/ui/main_ui.py b/src/ui/main_ui.py
index e6f533d..208569e 100644
--- a/src/ui/main_ui.py
+++ b/src/ui/main_ui.py
@@ -1,9 +1,8 @@
-import os
 import sys
 import atexit
 import datetime
 import webbrowser
-from src import config, __email__
+from src import config, __email__, docport
 from src.logic import Database, Catalogue, Backup
 from src.utils import stringToDate, Icon, Log
 from src.utils import debugMessage as dbg
@@ -18,8 +17,7 @@ from .settings import Settings
 from .newBook import NewBook
 from .loans import LoanWindow
 from .reportUi import ReportUi
-from src.utils import launch_documentation
-from PyQt6 import QtCore, QtWidgets, QtGui
+from PyQt6 import QtCore, QtWidgets
 from omegaconf import OmegaConf 
 from src.logic.documentation_thread import DocumentationThread
 backup = Backup()
@@ -89,7 +87,7 @@ class MainUI(QtWidgets.QMainWindow, Ui_MainWindow):
         self.activeUser = None
         self.activeState = "Rückgabe"
         self.docu = DocumentationThread()
-        # self.docu.start()
+        self.docu.start()
 
         self.duedate.setDate(loanDate)
         # functions
@@ -146,6 +144,7 @@ class MainUI(QtWidgets.QMainWindow, Ui_MainWindow):
             dialog = QtWidgets.QMessageBox()
             dialog.setWindowTitle("Einstellungen geändert")
             dialog.setIcon(QtWidgets.QMessageBox.Icon.Information)
+            dialog.setWindowIcon(Icon("settings").icon)
             dialog.setText("Einstellungen wurden geändert\nProgramm neu starten?")
             dialog.setStandardButtons(
                 QtWidgets.QMessageBox.StandardButton.Yes
@@ -166,7 +165,7 @@ class MainUI(QtWidgets.QMainWindow, Ui_MainWindow):
 
     def openDocumentation(self):
         log.info("Opening Documentation")
-        webbrowser.open("http://localhost:6543")
+        webbrowser.open("http://localhost:{}/".format(docport))
 
         
         
@@ -277,6 +276,7 @@ class MainUI(QtWidgets.QMainWindow, Ui_MainWindow):
             # set user to active user
             self.setUserData()
             self.activateLoanMode()
+            self.input_file_ident.setPlaceholderText("Buchidentifikation eingeben")
 
             self.input_file_ident.setFocus()
 
@@ -421,15 +421,16 @@ class MainUI(QtWidgets.QMainWindow, Ui_MainWindow):
                         return
                     newentry = NewEntry([book_id[0]])
                     newentry.exec()
-                    self.setStatusTipMessage("Neues Exemplar hinzugefügt")
-                    #print(created_ids)
-                    self.input_file_ident.setEnabled(True)
-                    newentries = newentry.newIds
-                    if newentries:
-                        for entry in newentries:
-                            book = self.db.getMedia(entry)
-                            self.loanMedia(user_id, [entry], book)
-                    dbg("inserted duplicated book into database")
+                    if newentry.result() == 1: # only create dialog if new entry was created
+                        self.setStatusTipMessage("Neues Exemplar hinzugefügt")
+                        #print(created_ids)
+                        self.input_file_ident.setEnabled(True)
+                        newentries = newentry.newIds
+                        if newentries:
+                            for entry in newentries:
+                                book = self.db.getMedia(entry)
+                                self.loanMedia(user_id, [entry], book)
+                        dbg("inserted duplicated book into database")
                     return
                 else:
                     #print("Book not loaned, loaning now")