diff --git a/src/calibre/gui2/dialogs/confirm_delete.py b/src/calibre/gui2/dialogs/confirm_delete.py
index 68513083eb..2edfc934c3 100644
--- a/src/calibre/gui2/dialogs/confirm_delete.py
+++ b/src/calibre/gui2/dialogs/confirm_delete.py
@@ -3,24 +3,54 @@ __license__   = 'GPL v3'
 __copyright__ = '2008, Kovid Goyal kovid@kovidgoyal.net'
 __docformat__ = 'restructuredtext en'
 
-from PyQt5.Qt import QDialog, Qt, QPixmap, QIcon
+from PyQt5.Qt import (
+    QDialog, Qt, QPixmap, QIcon, QSize, QVBoxLayout, QHBoxLayout, QLabel,
+    QCheckBox, QDialogButtonBox)
 
 from calibre import confirm_config_name
 from calibre.gui2 import dynamic
-from calibre.gui2.dialogs.confirm_delete_ui import Ui_Dialog
 
-class Dialog(QDialog, Ui_Dialog):
+class Dialog(QDialog):
 
-    def __init__(self, msg, name, parent, config_set=dynamic):
+    def __init__(self, msg, name, parent, config_set=dynamic, icon='dialog_warning.png',
+                 title=None, confirm_msg=None, show_cancel_button=True):
         QDialog.__init__(self, parent)
-        self.setupUi(self)
+        self.setWindowTitle(title or _("Are you sure?"))
+        self.setWindowIcon(QIcon(I(icon)))
+        self.l = l = QVBoxLayout(self)
+        self.h = h = QHBoxLayout()
+        l.addLayout(h)
+
+        self.label = la = QLabel(self)
+        la.setScaledContents(True), la.setMaximumSize(QSize(96, 96)), la.setMinimumSize(QSize(96, 96))
+        la.setPixmap(QPixmap(I(icon)))
+        la.setObjectName("label")
+
+        self.msg = m = QLabel(self)
+        m.setMinimumWidth(300), m.setWordWrap(True), m.setObjectName("msg")
+        m.setText(msg)
+
+        h.addWidget(la), h.addSpacing(10), h.addWidget(m)
+
+        self.again = a = QCheckBox((confirm_msg or _("&Show this warning again")), self)
+        a.setChecked(True), a.setObjectName("again")
+        a.stateChanged.connect(self.toggle)
+        l.addWidget(a)
+
+        buttons = QDialogButtonBox.Ok
+        if show_cancel_button:
+            buttons |= QDialogButtonBox.Cancel
+        self.buttonBox = bb = QDialogButtonBox(buttons, self)
+        bb.setObjectName("buttonBox")
+        bb.setFocus(Qt.OtherFocusReason)
+        bb.accepted.connect(self.accept), bb.rejected.connect(self.reject)
+        l.addWidget(bb)
 
-        self.msg.setText(msg)
         self.name = name
-        self.again.stateChanged.connect(self.toggle)
-        self.buttonBox.setFocus(Qt.OtherFocusReason)
         self.config_set = config_set
 
+        self.resize(self.sizeHint())
+
     def toggle(self, *args):
         self.config_set[confirm_config_name(self.name)] = self.again.isChecked()
 
@@ -30,14 +60,6 @@ def confirm(msg, name, parent=None, pixmap='dialog_warning.png', title=None,
     config_set = config_set or dynamic
     if not config_set.get(confirm_config_name(name), True):
         return True
-    d = Dialog(msg, name, parent, config_set=config_set)
-    d.label.setPixmap(QPixmap(I(pixmap)))
-    d.setWindowIcon(QIcon(I(pixmap)))
-    if title is not None:
-        d.setWindowTitle(title)
-    if not show_cancel_button:
-        d.buttonBox.button(d.buttonBox.Cancel).setVisible(False)
-    if confirm_msg is not None:
-        d.again.setText(confirm_msg)
-    d.resize(d.sizeHint())
+    d = Dialog(msg, name, parent, config_set=config_set, icon=pixmap,
+               title=title, confirm_msg=confirm_msg, show_cancel_button=show_cancel_button)
     return d.exec_() == d.Accepted
diff --git a/src/calibre/gui2/dialogs/confirm_delete.ui b/src/calibre/gui2/dialogs/confirm_delete.ui
deleted file mode 100644
index e5d35410db..0000000000
--- a/src/calibre/gui2/dialogs/confirm_delete.ui
+++ /dev/null
@@ -1,113 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<ui version="4.0">
- <class>Dialog</class>
- <widget class="QDialog" name="Dialog">
-  <property name="geometry">
-   <rect>
-    <x>0</x>
-    <y>0</y>
-    <width>439</width>
-    <height>300</height>
-   </rect>
-  </property>
-  <property name="windowTitle">
-   <string>Are you sure?</string>
-  </property>
-  <property name="windowIcon">
-   <iconset resource="../../../../resources/images.qrc">
-    <normaloff>:/images/dialog_warning.png</normaloff>:/images/dialog_warning.png</iconset>
-  </property>
-  <layout class="QGridLayout" name="gridLayout">
-   <item row="0" column="0">
-    <layout class="QHBoxLayout" name="horizontalLayout">
-     <item>
-      <widget class="QLabel" name="label">
-       <property name="pixmap">
-        <pixmap resource="../../../../resources/images.qrc">:/images/dialog_warning.png</pixmap>
-       </property>
-      </widget>
-     </item>
-     <item>
-      <widget class="QLabel" name="msg">
-       <property name="sizePolicy">
-        <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
-         <horstretch>0</horstretch>
-         <verstretch>0</verstretch>
-        </sizepolicy>
-       </property>
-       <property name="minimumSize">
-        <size>
-         <width>300</width>
-         <height>0</height>
-        </size>
-       </property>
-       <property name="text">
-        <string>TextLabel</string>
-       </property>
-       <property name="wordWrap">
-        <bool>true</bool>
-       </property>
-      </widget>
-     </item>
-    </layout>
-   </item>
-   <item row="1" column="0">
-    <widget class="QCheckBox" name="again">
-     <property name="text">
-      <string>&amp;Show this warning again</string>
-     </property>
-     <property name="checked">
-      <bool>true</bool>
-     </property>
-    </widget>
-   </item>
-   <item row="2" column="0">
-    <widget class="QDialogButtonBox" name="buttonBox">
-     <property name="orientation">
-      <enum>Qt::Horizontal</enum>
-     </property>
-     <property name="standardButtons">
-      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
-     </property>
-    </widget>
-   </item>
-  </layout>
- </widget>
- <resources>
-  <include location="../../../../resources/images.qrc"/>
- </resources>
- <connections>
-  <connection>
-   <sender>buttonBox</sender>
-   <signal>accepted()</signal>
-   <receiver>Dialog</receiver>
-   <slot>accept()</slot>
-   <hints>
-    <hint type="sourcelabel">
-     <x>248</x>
-     <y>254</y>
-    </hint>
-    <hint type="destinationlabel">
-     <x>157</x>
-     <y>274</y>
-    </hint>
-   </hints>
-  </connection>
-  <connection>
-   <sender>buttonBox</sender>
-   <signal>rejected()</signal>
-   <receiver>Dialog</receiver>
-   <slot>reject()</slot>
-   <hints>
-    <hint type="sourcelabel">
-     <x>316</x>
-     <y>260</y>
-    </hint>
-    <hint type="destinationlabel">
-     <x>286</x>
-     <y>274</y>
-    </hint>
-   </hints>
-  </connection>
- </connections>
-</ui>