diff --git a/gui/QT/main.cpp b/gui/QT/main.cpp
index 1838cfb3b..2efec8e93 100644
--- a/gui/QT/main.cpp
+++ b/gui/QT/main.cpp
@@ -35,7 +35,7 @@ int main(int argc, char *argv[]){
 	//important: If this line is removed parsing float numbers for vu meter fails
 	std::setlocale(LC_NUMERIC, "C");
 
-	process.start("\"" + ultragridExecutable + "\"");
+	process.start(ultragridExecutable, QStringList());
 	if(process.waitForStarted(1000) == false) {
 		QMessageBox msgBox;
 		msgBox.setText(ultragridExecutable + " doesn't seem to be executable.");
diff --git a/gui/QT/option/available_settings.cpp b/gui/QT/option/available_settings.cpp
index a67024353..95f177b29 100644
--- a/gui/QT/option/available_settings.cpp
+++ b/gui/QT/option/available_settings.cpp
@@ -1,5 +1,6 @@
 #include <QProcess>
 #include <QString>
+#include <QStringList>
 #include <QRegularExpression>
 #include <QJsonDocument>
 #include <QJsonObject>
@@ -18,9 +19,9 @@ static bool vectorContains(const std::vector<std::string> &v, const std::string
 	return false;
 }
 
-static QStringList getProcessOutput(const std::string& executable, const std::string& command){
+static QStringList getProcessOutput(const std::string& executable, const QStringList& args){
 	QProcess process;
-	process.start((executable + command).c_str());
+	process.start(executable.c_str(), args);
 	process.waitForFinished();
 
 	QString output = QString(process.readAllStandardOutput());
@@ -30,7 +31,7 @@ static QStringList getProcessOutput(const std::string& executable, const std::st
 }
 
 void AvailableSettings::queryAll(const std::string &executable){
-	QStringList lines = getProcessOutput(executable, " --capabilities");
+	QStringList lines = getProcessOutput(executable, QStringList() << "--capabilities");
 
 	queryCap(lines, VIDEO_SRC, "[cap][capture] ");
 	queryCap(lines, VIDEO_DISPLAY, "[cap][display] ");
diff --git a/gui/QT/window/ultragrid_window.cpp b/gui/QT/window/ultragrid_window.cpp
index a849bd768..2b9aa9803 100644
--- a/gui/QT/window/ultragrid_window.cpp
+++ b/gui/QT/window/ultragrid_window.cpp
@@ -12,6 +12,20 @@
 #include <CoreFoundation/CoreFoundation.h>
 #endif
 
+namespace {
+QString argListToString(const QStringList& argList){
+	return argList.join(" ");
+}
+
+QStringList argStringToList(const QString& argString){
+	return argString.split(" ", Qt::SkipEmptyParts);
+}
+
+QStringList argStringToList(const std::string& argString){
+	return QString::fromStdString(argString).split(" ", Qt::SkipEmptyParts);
+}
+} //anonymous namespace
+
 UltragridWindow::UltragridWindow(QWidget *parent): QMainWindow(parent){
 	ui.setupUi(this);
 	//ui.terminal->setVisible(false);
@@ -19,7 +33,7 @@ UltragridWindow::UltragridWindow(QWidget *parent): QMainWindow(parent){
 	ui.actionTest->setVisible(true);
 #endif //DEBUG
 
-	ultragridExecutable = "\"" + UltragridWindow::findUltragridExecutable() + "\"";
+	ultragridExecutable = UltragridWindow::findUltragridExecutable();
 
 #ifndef __linux
 	ui.actionUse_hw_acceleration->setVisible(false);
@@ -152,13 +166,9 @@ void UltragridWindow::start(){
 
 	stopPreview();
 
-	QString command(ultragridExecutable);
-
-	command += " ";
-	command += launchArgs;
 	process.setProcessChannelMode(QProcess::MergedChannels);
-	log.write("Command: " + command + "\n\n");
-	process.start(command);
+	log.write("Command args: " + argListToString(launchArgs) + "\n\n");
+	process.start(ultragridExecutable, launchArgs);
 }
 
 void UltragridWindow::schedulePreview(){
@@ -176,8 +186,7 @@ void UltragridWindow::startPreview(){
 	while(previewProcess.state() != QProcess::NotRunning)
 		stopPreview();
 
-	QString command(ultragridExecutable);
-	command += QString::fromStdString(settings.getPreviewParams());
+	QStringList previewArgs = argStringToList(settings.getPreviewParams());
 	/*
 	if(sourceOption->getCurrentValue() != "none"){
 		//We prevent video from network overriding local sources
@@ -187,9 +196,9 @@ void UltragridWindow::startPreview(){
 	*/
 
 #ifdef DEBUG
-	log.write("Preview: " + command + "\n\n");
+	log.write("Preview: " + argListToString(previewArgs) + "\n\n");
 #endif
-	previewProcess.start(command);
+	previewProcess.start(ultragridExecutable, previewArgs);
 }
 
 void UltragridWindow::stopPreview(){
@@ -203,11 +212,14 @@ void UltragridWindow::stopPreview(){
 }
 
 void UltragridWindow::editArgs(const QString &text){
-	launchArgs = text;
+	launchArgs = argStringToList(text);
 }
 
 void UltragridWindow::setArgs(){
 	QString args = QString::fromStdString(settings.getLaunchParams());
+
+	launchArgs = argStringToList(args);
+
 #ifdef DEBUG
 	log.write("set args: " + args + "\n");
 #endif
diff --git a/gui/QT/window/ultragrid_window.hpp b/gui/QT/window/ultragrid_window.hpp
index 531d19370..9c5927ee1 100644
--- a/gui/QT/window/ultragrid_window.hpp
+++ b/gui/QT/window/ultragrid_window.hpp
@@ -2,6 +2,7 @@
 #define ULTRAGRID_WINDOW_HPP
 
 #include <QProcess>
+#include <QStringList>
 #include <vector>
 #include <memory>
 
@@ -38,7 +39,7 @@ private:
 
 	AvailableSettings availableSettings;
 
-	QString launchArgs;
+	QStringList launchArgs;
 	QStringList getOptionsForParam(QString param);
 	LogWindow log;
 	SettingsWindow settingsWindow;