diff --git a/src/nostalgia/studio/main.cpp b/src/nostalgia/studio/main.cpp
index 97d91a2a..c371a379 100644
--- a/src/nostalgia/studio/main.cpp
+++ b/src/nostalgia/studio/main.cpp
@@ -16,5 +16,5 @@ int main(int argc, const char **argv) {
 #endif
 	nostalgia::registerKeelModules();
 	nostalgia::registerStudioModules();
-	return studio::main("Nostalgia Studio", ox::String(".nostalgia"), argc, argv);
+	return studio::main("Nostalgia Studio", ".nostalgia", argc, argv);
 }
diff --git a/src/studio/applib/include/studioapp/studioapp.hpp b/src/studio/applib/include/studioapp/studioapp.hpp
index da02d82e..3d74e02e 100644
--- a/src/studio/applib/include/studioapp/studioapp.hpp
+++ b/src/studio/applib/include/studioapp/studioapp.hpp
@@ -21,7 +21,7 @@ int main(StudioOptions&&);
 
 int main(
 		ox::CRStringView appName,
-		ox::String projectDataDir,
+		ox::CRStringView projectDataDir,
 		int argc,
 		const char **argv);
 
diff --git a/src/studio/applib/src/main.cpp b/src/studio/applib/src/main.cpp
index cc468a52..64eb99d9 100644
--- a/src/studio/applib/src/main.cpp
+++ b/src/studio/applib/src/main.cpp
@@ -19,13 +19,13 @@ namespace studio {
 
 class StudioUIDrawer: public turbine::gl::Drawer {
 	private:
-		StudioUI *m_ui = nullptr;
+		StudioUI &m_ui;
 	public:
-		explicit StudioUIDrawer(StudioUI *ui) noexcept: m_ui(ui) {
+		explicit StudioUIDrawer(StudioUI &ui) noexcept: m_ui(ui) {
 		}
 	protected:
 		void draw(turbine::Context&) noexcept final {
-			m_ui->draw();
+			m_ui.draw();
 		}
 };
 
@@ -44,7 +44,7 @@ static void keyEventHandler(turbine::Context &ctx, turbine::Key key, bool down)
 
 static ox::Error runApp(
 		ox::CRStringView appName,
-		ox::String projectDataDir,
+		ox::CRStringView projectDataDir,
 		ox::UniquePtr<ox::FileSystem> fs) noexcept {
 	oxRequireM(ctx, turbine::init(std::move(fs), appName));
 	turbine::setWindowTitle(*ctx, ctx->keelCtx.appName);
@@ -53,9 +53,9 @@ static ox::Error runApp(
 	turbine::setConstantRefresh(*ctx, false);
 	studio::StudioContext studioCtx;
 	turbine::setApplicationData(*ctx, &studioCtx);
-	StudioUI ui(ctx.get(), std::move(projectDataDir));
+	StudioUI ui(ctx.get(), projectDataDir);
 	studioCtx.ui = &ui;
-	StudioUIDrawer drawer(&ui);
+	StudioUIDrawer drawer(ui);
 	turbine::gl::addDrawer(*ctx, &drawer);
 	const auto err = turbine::run(*ctx);
 	turbine::gl::removeDrawer(*ctx, &drawer);
@@ -64,7 +64,7 @@ static ox::Error runApp(
 
 int main(
 		ox::CRStringView appName,
-		ox::String projectDataDir,
+		ox::CRStringView projectDataDir,
 		int,
 		const char**) {
 	OX_INIT_DEBUG_LOGGER(loggerConn, appName)
@@ -75,13 +75,13 @@ int main(
 		static_cast<uint64_t>(time << 1)
 	});
 	// run app
-	const auto err = runApp(appName, std::move(projectDataDir), ox::UniquePtr<ox::FileSystem>(nullptr));
+	const auto err = runApp(appName, projectDataDir, ox::UniquePtr<ox::FileSystem>(nullptr));
 	oxAssert(err, "Something went wrong...");
 	return static_cast<int>(err);
 }
 
 int main(StudioOptions &&opts, int argc = 0, const char **argv = nullptr) {
-	return main(opts.appName, std::move(opts.projectDataDir), argc, argv);
+	return main(opts.appName, opts.projectDataDir, argc, argv);
 }
 
 }
diff --git a/src/studio/applib/src/studioapp.cpp b/src/studio/applib/src/studioapp.cpp
index c39dc50c..abdd8eb0 100644
--- a/src/studio/applib/src/studioapp.cpp
+++ b/src/studio/applib/src/studioapp.cpp
@@ -33,9 +33,9 @@ oxModelBegin(StudioConfig)
 	oxModelFieldRename(show_project_explorer, showProjectExplorer)
 oxModelEnd()
 
-StudioUI::StudioUI(turbine::Context *ctx, ox::String projectDir) noexcept:
+StudioUI::StudioUI(turbine::Context *ctx, ox::StringView projectDir) noexcept:
 	m_ctx(ctx),
-	m_projectDir(std::move(projectDir)),
+	m_projectDir(projectDir),
 	m_projectExplorer(ox::make_unique<ProjectExplorer>(m_ctx)),
 	m_aboutPopup(*ctx) {
 	m_projectExplorer->fileChosen.connect(this, &StudioUI::openFile);
@@ -253,8 +253,8 @@ void StudioUI::drawTabs() noexcept {
 	}
 }
 
-void StudioUI::loadEditorMaker(const studio::EditorMaker &editorMaker) noexcept {
-	for (const auto &ext : editorMaker.fileTypes) {
+void StudioUI::loadEditorMaker(studio::EditorMaker const&editorMaker) noexcept {
+	for (auto const&ext : editorMaker.fileTypes) {
 		m_editorMakers[ext] = editorMaker.make;
 	}
 }
@@ -370,7 +370,7 @@ ox::Error StudioUI::openFileActiveTab(ox::CRStringView path, bool makeActiveTab)
 	return {};
 }
 
-ox::Error StudioUI::closeFile(const ox::String &path) noexcept {
+ox::Error StudioUI::closeFile(ox::CRStringView path) noexcept {
 	if (!m_openFiles.contains(path)) {
 		return OxError(0);
 	}
diff --git a/src/studio/applib/src/studioapp.hpp b/src/studio/applib/src/studioapp.hpp
index 7ed9a00f..8a652536 100644
--- a/src/studio/applib/src/studioapp.hpp
+++ b/src/studio/applib/src/studioapp.hpp
@@ -44,14 +44,14 @@ class StudioUI: public ox::SignalHandler {
 		bool m_showProjectExplorer = true;
 
 	public:
-		explicit StudioUI(turbine::Context *ctx, ox::String projectDir) noexcept;
+		explicit StudioUI(turbine::Context *ctx, ox::StringView projectDir) noexcept;
 
 		void update() noexcept;
 
 		void handleKeyEvent(turbine::Key, bool down) noexcept;
 
 		[[nodiscard]]
-		constexpr auto project() noexcept {
+		constexpr studio::Project *project() noexcept {
 			return m_project.get();
 		}
 
@@ -65,7 +65,7 @@ class StudioUI: public ox::SignalHandler {
 
 		void drawTabs() noexcept;
 
-		void loadEditorMaker(const studio::EditorMaker &editorMaker) noexcept;
+		void loadEditorMaker(studio::EditorMaker const&editorMaker) noexcept;
 
 		void loadModule(const studio::Module *mod) noexcept;
 
@@ -85,7 +85,7 @@ class StudioUI: public ox::SignalHandler {
 
 		ox::Error openFileActiveTab(ox::CRStringView path, bool makeActiveTab) noexcept;
 
-		ox::Error closeFile(const ox::String &path) noexcept;
+		ox::Error closeFile(ox::CRStringView path) noexcept;
 };
 
 }