diff --git a/Tools/QtBiomeVisualiser/ChunkSource.cpp b/Tools/QtBiomeVisualiser/ChunkSource.cpp
index 54da2afe5..d8cecbaa4 100644
--- a/Tools/QtBiomeVisualiser/ChunkSource.cpp
+++ b/Tools/QtBiomeVisualiser/ChunkSource.cpp
@@ -142,8 +142,8 @@ static void biomesToImage(cChunkDef::BiomeMap & a_Biomes, Chunk::Image & a_Image
 ////////////////////////////////////////////////////////////////////////////////
 // BioGenSource:
 
-BioGenSource::BioGenSource(QString a_WorldIniPath) :
-	m_WorldIniPath(a_WorldIniPath),
+BioGenSource::BioGenSource(cIniFilePtr a_IniFile) :
+	m_IniFile(a_IniFile),
 	m_Mtx(QMutex::Recursive)
 {
 	reload();
@@ -171,14 +171,10 @@ void BioGenSource::getChunkBiomes(int a_ChunkX, int a_ChunkZ, ChunkPtr a_DestChu
 
 void BioGenSource::reload()
 {
-	cIniFile ini;
-	ini.ReadFile(m_WorldIniPath.toStdString());
-	int seed = ini.GetValueSetI("Seed", "Seed", 0);
+	int seed = m_IniFile->GetValueSetI("Seed", "Seed", 0);
 	bool unused = false;
 	QMutexLocker lock(&m_Mtx);
-	m_BiomeGen.reset(cBiomeGen::CreateBiomeGen(ini, seed, unused));
-	lock.unlock();
-	ini.WriteFile(m_WorldIniPath.toStdString());
+	m_BiomeGen.reset(cBiomeGen::CreateBiomeGen(*m_IniFile, seed, unused));
 }
 
 
diff --git a/Tools/QtBiomeVisualiser/ChunkSource.h b/Tools/QtBiomeVisualiser/ChunkSource.h
index a5612da01..05e8ac5de 100644
--- a/Tools/QtBiomeVisualiser/ChunkSource.h
+++ b/Tools/QtBiomeVisualiser/ChunkSource.h
@@ -12,6 +12,7 @@
 class cBiomeGen;
 typedef std::shared_ptr<cBiomeGen> cBiomeGenPtr;
 class cIniFile;
+typedef std::shared_ptr<cIniFile> cIniFilePtr;
 
 
 
@@ -41,15 +42,15 @@ class BioGenSource :
 {
 public:
 	/** Constructs a new BioGenSource based on the biome generator that is defined in the specified world.ini file. */
-	BioGenSource(QString a_WorldIniPath);
+	BioGenSource(cIniFilePtr a_IniFile);
 
 	// ChunkSource overrides:
 	virtual void getChunkBiomes(int a_ChunkX, int a_ChunkZ, ChunkPtr a_DestChunk) override;
 	virtual void reload(void) override;
 
 protected:
-	/** Path to the world.ini file from which the m_WorldIni is regenerated on reload requests. */
-	QString m_WorldIniPath;
+	/** The world.ini contents from which the generator is created and re-created on reload(). */
+	cIniFilePtr m_IniFile;
 
 	/** The generator used for generating biomes. */
 	std::unique_ptr<cBiomeGen> m_BiomeGen;
diff --git a/Tools/QtBiomeVisualiser/MainWindow.cpp b/Tools/QtBiomeVisualiser/MainWindow.cpp
index f9915901d..c55d85082 100644
--- a/Tools/QtBiomeVisualiser/MainWindow.cpp
+++ b/Tools/QtBiomeVisualiser/MainWindow.cpp
@@ -53,12 +53,12 @@ MainWindow::~MainWindow()
 
 void MainWindow::newGenerator()
 {
-	// TODO
-
-	// (Re-)open the generator setup dialog:
+	// (Re-)open the generator setup dialog with empty settings:
 	openGeneratorSetup("");
 
-	// TODO
+	// Set the chunk source:
+	m_BiomeView->setChunkSource(std::shared_ptr<BioGenSource>(new BioGenSource(m_GeneratorSetup->getIniFile())));
+	m_BiomeView->redraw();
 }
 
 
@@ -78,7 +78,7 @@ void MainWindow::openGenerator()
 	openGeneratorSetup(worldIni.toStdString());
 
 	// Set the chunk source:
-	m_BiomeView->setChunkSource(std::shared_ptr<BioGenSource>(new BioGenSource(worldIni)));
+	m_BiomeView->setChunkSource(std::shared_ptr<BioGenSource>(new BioGenSource(m_GeneratorSetup->getIniFile())));
 	m_BiomeView->redraw();
 }