diff --git a/app/dialog/export/codec/h264section.h b/app/dialog/export/codec/h264section.h
index b6ef70514..0a00f18f6 100644
--- a/app/dialog/export/codec/h264section.h
+++ b/app/dialog/export/codec/h264section.h
@@ -40,12 +40,12 @@ public:
 	int GetValue() const;
 	void SetValue(int c);
 
-	static const int kDefaultH264CRF = 18;
-	static const int kDefaultH265CRF = 23;
+	static constexpr int kDefaultH264CRF = 18;
+	static constexpr int kDefaultH265CRF = 23;
 
 private:
-	static const int kMinimumCRF = 0;
-	static const int kMaximumCRF = 51;
+	static constexpr int kMinimumCRF = 0;
+	static constexpr int kMaximumCRF = 51;
 
 	QSlider *crf_slider_;
 };
diff --git a/app/dialog/export/exportformatcombobox.h b/app/dialog/export/exportformatcombobox.h
index 82890ff85..ec30a38d4 100644
--- a/app/dialog/export/exportformatcombobox.h
+++ b/app/dialog/export/exportformatcombobox.h
@@ -71,7 +71,7 @@ private:
 
 	Menu *custom_menu_;
 
-	ExportFormat::Format current_;
+	ExportFormat::Format current_ = ExportFormat::kFormatCount;
 };
 
 }
diff --git a/app/dialog/export/exportsubtitlestab.h b/app/dialog/export/exportsubtitlestab.h
index c54a4a006..ecb3a84bc 100644
--- a/app/dialog/export/exportsubtitlestab.h
+++ b/app/dialog/export/exportsubtitlestab.h
@@ -44,7 +44,7 @@ public:
 	}
 	void SetSidecarEnabled(bool e)
 	{
-		sidecar_checkbox_->setEnabled(e);
+		sidecar_checkbox_->setChecked(e);
 	}
 
 	ExportFormat::Format GetSidecarFormat() const
diff --git a/app/dialog/sequence/sequencepreset.h b/app/dialog/sequence/sequencepreset.h
index f36bd5a54..0c105b866 100644
--- a/app/dialog/sequence/sequencepreset.h
+++ b/app/dialog/sequence/sequencepreset.h
@@ -70,7 +70,10 @@ public:
 			} else if (reader->name() == QStringLiteral("pixelaspect")) {
 				pixel_aspect_ = rational::fromString(
 					reader->readElementText().toStdString());
-			} else if (reader->name() == QStringLiteral("interlacing")) {
+			} else if (reader->name() == QStringLiteral("interlacing") ||
+					   reader->name() == QStringLiteral("interlacing_")) {
+				// "interlacing_" is the element name mistakenly written by
+				// older versions of Save(); accept it for backward compatibility
 				interlacing_ = static_cast<VideoParams::Interlacing>(
 					reader->readElementText().toInt());
 			} else if (reader->name() == QStringLiteral("samplerate")) {
@@ -103,7 +106,7 @@ public:
 		writer->writeTextElement(
 			QStringLiteral("pixelaspect"),
 			QString::fromStdString(pixel_aspect_.toString()));
-		writer->writeTextElement(QStringLiteral("interlacing_"),
+		writer->writeTextElement(QStringLiteral("interlacing"),
 								 QString::number(interlacing_));
 		writer->writeTextElement(QStringLiteral("samplerate"),
 								 QString::number(sample_rate_));