diff --git a/locales/en.ftl b/locales/en.ftl
index f1807c3..99b47f1 100644
--- a/locales/en.ftl
+++ b/locales/en.ftl
@@ -66,6 +66,9 @@ close = Close
 # Copy right
 copy-right = © 2021 Salem Yaslem
 
+# Close error dialog
+close-error-dialog = Close
+
 # Run command label
 default-command = Default command:
 
@@ -81,12 +84,12 @@ delay-title = Start Recording in…
 # Stop delay timer
 delay-window-stop = Stop
 
-# About message
-dialog-comment =  A simple screen recorder for Linux desktop. Supports Wayland & Xorg.
-
 # Details button
 details-button = Details
 
+# About message
+dialog-comment =  A simple screen recorder for Linux desktop. Supports Wayland & Xorg.
+
 # Run command input
 enter-command = Enter your command here..
 
diff --git a/src/ui.rs b/src/ui.rs
index 19d61dc..f0f64ff 100644
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -170,7 +170,7 @@ fn build_ui(application: &Application, error_dialog: MessageDialog, error_messag
     format_chooser_combobox.append(Some("avi"), &get_bundle("avi-format", None));
     format_chooser_combobox.append(Some("wmv"), &get_bundle("wmv-format", None));
     format_chooser_combobox.append(Some("nut"), &get_bundle("nut-format", None));
-    format_chooser_combobox.set_active(Some(config_management::get("default", "format").parse::<u32>().unwrap()));
+    format_chooser_combobox.set_active(Some(config_management::get("default", "format").parse::<u32>().unwrap_or(0u32)));
 
     // Get audio sources
     let input_device = host_audio_device.input_devices().unwrap();
@@ -373,17 +373,17 @@ fn build_ui(application: &Application, error_dialog: MessageDialog, error_messag
                                ("frame-{}",
                                 &format_chooser_combobox.active().unwrap().to_string()))
             .parse::<f64>()
-            .unwrap(),
+            .unwrap_or(0f64),
     );
     audio_bitrate_spin.set_value(
         config_management::get("default", "audiobitrate")
             .parse::<f64>()
-            .unwrap(),
+            .unwrap_or(0f64),
     );
     delay_spin.set_value(
         config_management::get("default", "delay")
             .parse::<f64>()
-            .unwrap(),
+            .unwrap_or(0f64),
     );
     video_bitrate_spin.set_value(
         config_management::get("default",
@@ -391,7 +391,7 @@ fn build_ui(application: &Application, error_dialog: MessageDialog, error_messag
                                ("videobitrate-{}",
                                 &format_chooser_combobox.active().unwrap().to_string()))
             .parse::<f64>()
-            .unwrap(),
+            .unwrap_or(0f64),
     );
 
     let _format_chooser_combobox = format_chooser_combobox.clone();
@@ -411,7 +411,7 @@ fn build_ui(application: &Application, error_dialog: MessageDialog, error_messag
                                        ("frame-{}",
                                         &format_chooser_combobox.active().unwrap().to_string()))
                     .parse::<f64>()
-                    .unwrap(),
+                    .unwrap_or(0f64),
             );
             _video_bitrate_spin.set_value(
                 config_management::get("default",
@@ -419,7 +419,7 @@ fn build_ui(application: &Application, error_dialog: MessageDialog, error_messag
                                        ("videobitrate-{}",
                                         &format_chooser_combobox.active().unwrap().to_string()))
                     .parse::<f64>()
-                    .unwrap(),
+                    .unwrap_or(0f64),
             );
         }
     });