diff --git a/gtk3/main.c b/gtk3/main.c
index 474c41f..576a363 100644
--- a/gtk3/main.c
+++ b/gtk3/main.c
@@ -278,6 +278,7 @@ static void setup_menu(GApplication *app) {
 			g_print("Showing hamburger\n");
 			// Attach a custom title bar
 			GtkWidget *titlebar = gtkget(GTK_WIDGET, "main_header_bar");
+			gtk_header_bar_set_title(GTK_HEADER_BAR(titlebar), gtk_window_get_title(GTK_WINDOW(main_window)));
 			gtk_window_set_titlebar(GTK_WINDOW(main_window), titlebar);
 
 			// Disable menubar
@@ -769,7 +770,7 @@ G_MODULE_EXPORT void on_boot_rom_location_changed(GtkWidget *w, gpointer user_da
 
 G_MODULE_EXPORT void on_cgb_model_changed(GtkWidget *w, gpointer user_data_gptr) {
 	GtkComboBox *box = GTK_COMBO_BOX(w);
-	g_print("New value: %s\n", gtk_combo_box_get_active_id(box));
+	config.cgb_revision_name = (gchar *)gtk_combo_box_get_active_id(box);
 }
 
 G_MODULE_EXPORT void on_color_correction_changed(GtkWidget *w, gpointer user_data_gptr) {
@@ -787,7 +788,7 @@ G_MODULE_EXPORT void on_color_menubar_override_changed(GtkWidget *w, gpointer us
 
 G_MODULE_EXPORT void on_dmg_model_changed(GtkWidget *w, gpointer user_data_gptr) {
 	GtkComboBox *box = GTK_COMBO_BOX(w);
-	g_print("New value: %s\n", gtk_combo_box_get_active_id(box));
+	config.dmg_revision_name = (gchar *)gtk_combo_box_get_active_id(box);
 }
 
 G_MODULE_EXPORT void on_graphic_filter_changed(GtkWidget *w, gpointer user_data_gptr) {
@@ -814,12 +815,12 @@ G_MODULE_EXPORT void on_keep_aspect_ratio_changed(GtkWidget *w, gpointer user_da
 
 G_MODULE_EXPORT void on_rewind_duration_changed(GtkWidget *w, gpointer user_data_gptr) {
 	GtkComboBox *box = GTK_COMBO_BOX(w);
-	g_print("New value: %s\n", gtk_combo_box_get_active_id(box));
+	config.rewind_duration = g_ascii_strtoll(gtk_combo_box_get_active_id(box), NULL, 10);
 }
 
 G_MODULE_EXPORT void on_sgb_model_changed(GtkWidget *w, gpointer user_data_gptr) {
 	GtkComboBox *box = GTK_COMBO_BOX(w);
-	g_print("New value: %s\n", gtk_combo_box_get_active_id(box));
+	config.sgb_revision_name = (gchar *)gtk_combo_box_get_active_id(box);
 }
 
 G_MODULE_EXPORT void on_use_integer_scaling_changed(GtkWidget *w, gpointer user_data_gptr) {
diff --git a/gtk3/settings.c b/gtk3/settings.c
index 95a7b93..abcb0fc 100644
--- a/gtk3/settings.c
+++ b/gtk3/settings.c
@@ -91,7 +91,7 @@ void save_config_to_key_file(config_t *config, GKeyFile *key_file) {
 #undef EXPAND_GROUP_MEMBER_IF_1
 }
 
-G_MODULE_EXPORT void on_preferences_realize(GtkWidget *w, gpointer builder_ptr) {
+void on_preferences_realize(GtkWidget *w, gpointer builder_ptr) {
 	GtkWindow *preferences = GTK_WINDOW(w);
 	GtkBuilder *builder = (GtkBuilder *) builder_ptr;
 	
diff --git a/gtk3/settings.h b/gtk3/settings.h
index 2dd2e58..af84153 100644
--- a/gtk3/settings.h
+++ b/gtk3/settings.h
@@ -69,7 +69,7 @@ gchar* settings_file_path;
 GKeyFile *key_file;
 config_t config;
 
-G_MODULE_EXPORT void on_preferences_realize(GtkWidget *w, gpointer builder_ptr);
+void on_preferences_realize(GtkWidget *w, gpointer builder_ptr);
 
 void print_config(config_t *config);
 void load_config_from_key_file(config_t *config, GKeyFile *key_file);