diff --git a/src/gui_qt/_py/fcreader.py b/src/gui_qt/_py/fcreader.py
index 766c641..041a46c 100644
--- a/src/gui_qt/_py/fcreader.py
+++ b/src/gui_qt/_py/fcreader.py
@@ -1,10 +1,11 @@
 # -*- coding: utf-8 -*-
 
-# Form implementation generated from reading ui file 'resources/_ui/fcreader.ui'
+# Form implementation generated from reading ui file 'src/resources/_ui/fcreader.ui'
 #
-# Created by: PyQt5 UI code generator 5.12.3
+# Created by: PyQt5 UI code generator 5.15.10
 #
-# WARNING! All changes made in this file will be lost!
+# WARNING: Any manual changes made to this file will be lost when pyuic5 is
+# run again.  Do not edit this file unless you know what you are doing.
 
 
 from PyQt5 import QtCore, QtGui, QtWidgets
@@ -47,6 +48,7 @@ class Ui_FCEval_dialog(object):
         self.verticalLayout.addWidget(self.input_box)
         self.region_box = QtWidgets.QGroupBox(FCEval_dialog)
         self.region_box.setCheckable(True)
+        self.region_box.setChecked(False)
         self.region_box.setObjectName("region_box")
         self.horizontalLayout = QtWidgets.QHBoxLayout(self.region_box)
         self.horizontalLayout.setContentsMargins(3, 3, 3, 3)
@@ -139,6 +141,7 @@ class Ui_FCEval_dialog(object):
         self.line.setObjectName("line")
         self.gridLayout.addWidget(self.line, 2, 0, 1, 2)
         self.graph_comboBox = QtWidgets.QComboBox(self.out_box)
+        self.graph_comboBox.setEnabled(False)
         self.graph_comboBox.setObjectName("graph_comboBox")
         self.gridLayout.addWidget(self.graph_comboBox, 3, 1, 1, 1)
         self.graph_checkbox = QtWidgets.QCheckBox(self.out_box)
@@ -167,8 +170,8 @@ class Ui_FCEval_dialog(object):
         self.label_6.setBuddy(self.m0_cb)
 
         self.retranslateUi(FCEval_dialog)
-        self.buttonBox.accepted.connect(FCEval_dialog.accept)
-        self.buttonBox.rejected.connect(FCEval_dialog.reject)
+        self.buttonBox.accepted.connect(FCEval_dialog.accept) # type: ignore
+        self.buttonBox.rejected.connect(FCEval_dialog.reject) # type: ignore
         QtCore.QMetaObject.connectSlotsByName(FCEval_dialog)
 
     def retranslateUi(self, FCEval_dialog):
@@ -178,7 +181,7 @@ class Ui_FCEval_dialog(object):
         self.file_pushbutton.setText(_translate("FCEval_dialog", "Add HDF files..."))
         self.dir_pushbutton.setText(_translate("FCEval_dialog", "Add directory..."))
         self.overwrite_cb.setText(_translate("FCEval_dialog", "Overwrite prev. data"))
-        self.region_box.setTitle(_translate("FCEval_dialog", "Evaluate region (empty values default to start/end)"))
+        self.region_box.setTitle(_translate("FCEval_dialog", "Evaluate region (empty values default to values of the script)"))
         self.start_lineedit.setPlaceholderText(_translate("FCEval_dialog", "start pos in µs"))
         self.stop_lineedit.setPlaceholderText(_translate("FCEval_dialog", "end pos in µs"))
         self.fit_box.setTitle(_translate("FCEval_dialog", "Fit equation"))
diff --git a/src/gui_qt/io/fcbatchreader.py b/src/gui_qt/io/fcbatchreader.py
index 664394c..c4bb80b 100644
--- a/src/gui_qt/io/fcbatchreader.py
+++ b/src/gui_qt/io/fcbatchreader.py
@@ -22,7 +22,9 @@ class QFCReader(QtWidgets.QDialog, Ui_FCEval_dialog):
         self.start_lineedit.setValidator(QtGui.QDoubleValidator())
         self.stop_lineedit.setValidator(QtGui.QDoubleValidator())
 
-        self.graph_checkbox.stateChanged.connect(lambda x: self.graph_comboBox.setEnabled(not bool(x)))
+        self.graph_checkbox.stateChanged.connect(
+            lambda x: self.graph_comboBox.setEnabled(x == QtCore.Qt.CheckState.Unchecked)
+        )
 
         self.listWidget.installEventFilter(self)
 
diff --git a/src/resources/_ui/fcreader.ui b/src/resources/_ui/fcreader.ui
index 7c818de..ff4695c 100644
--- a/src/resources/_ui/fcreader.ui
+++ b/src/resources/_ui/fcreader.ui
@@ -96,11 +96,14 @@
    <item>
     <widget class="QGroupBox" name="region_box">
      <property name="title">
-      <string>Evaluate region (empty values default to start/end)</string>
+      <string>Evaluate region (empty values default to values of the script)</string>
      </property>
      <property name="checkable">
       <bool>true</bool>
      </property>
+     <property name="checked">
+      <bool>false</bool>
+     </property>
      <layout class="QHBoxLayout" name="horizontalLayout">
       <property name="spacing">
        <number>3</number>
@@ -311,7 +314,11 @@
        </widget>
       </item>
       <item row="3" column="1">
-       <widget class="QComboBox" name="graph_comboBox"/>
+       <widget class="QComboBox" name="graph_comboBox">
+        <property name="enabled">
+         <bool>false</bool>
+        </property>
+       </widget>
       </item>
       <item row="3" column="0">
        <widget class="QCheckBox" name="graph_checkbox">