diff --git a/src/gui/src/PluginManager.cpp b/src/gui/src/PluginManager.cpp
index 813f52e1..38b60833 100644
--- a/src/gui/src/PluginManager.cpp
+++ b/src/gui/src/PluginManager.cpp
@@ -74,6 +74,23 @@ PluginManager::~PluginManager()
 {
 }
 
+bool PluginManager::exist(QString name)
+{
+	CoreInterface coreInterface;
+	QString PluginDir = coreInterface.getPluginDir();
+	QString pluginName = getPluginOsSpecificName(name);
+	QString filename;
+	filename.append(PluginDir);
+	filename.append(QDir::separator()).append(pluginName);
+	QFile file(filename);
+	bool exist = false;
+	if (file.exists()) {
+		exist = true;
+	}
+
+	return exist;
+}
+
 void PluginManager::downloadPlugins()
 {
 	if (m_DataDownloader.isFinished()) {
@@ -251,19 +268,6 @@ QString PluginManager::getOpenSslSetupUrl()
 	return result;
 }
 
-QString PluginManager::getPluginOsSpecificName(const QString& pluginName)
-{
-	QString result = pluginName;
-#if defined(Q_OS_WIN)
-	result.append(kWinPluginExt);
-#elif defined(Q_OS_MAC)
-	result = kMacPluginPrefix + pluginName + kMacPluginExt;
-#else
-	result = kLinuxPluginPrefix + pluginName + kLinuxPluginExt;
-#endif
-	return result;
-}
-
 bool PluginManager::checkOpenSslBinary()
 {
 	// assume OpenSsl is unavailable on Windows,
@@ -426,3 +430,16 @@ bool PluginManager::runProgram(
 
 	return true;
 }
+
+QString PluginManager::getPluginOsSpecificName(const QString& pluginName)
+{
+	QString result = pluginName;
+#if defined(Q_OS_WIN)
+	result.append(kWinPluginExt);
+#elif defined(Q_OS_MAC)
+	result = kMacPluginPrefix + pluginName + kMacPluginExt;
+#else
+	result = kLinuxPluginPrefix + pluginName + kLinuxPluginExt;
+#endif
+	return result;
+}
diff --git a/src/gui/src/PluginManager.h b/src/gui/src/PluginManager.h
index c7e52c30..51e58e0a 100644
--- a/src/gui/src/PluginManager.h
+++ b/src/gui/src/PluginManager.h
@@ -35,6 +35,8 @@ public:
 
 	int downloadIndex() { return m_DownloadIndex; }
 
+	static bool exist(QString name);
+
 public slots:
 	void downloadPlugins();
 	void saveOpenSslSetup();
@@ -45,7 +47,6 @@ private:
 	void savePlugin();
 	QString getPluginUrl(const QString& pluginName);
 	QString getOpenSslSetupUrl();
-	QString getPluginOsSpecificName(const QString& pluginName);
 	bool checkOpenSslBinary();
 	void downloadOpenSslSetup();
 	bool runProgram(
@@ -53,6 +54,8 @@ private:
 		const QStringList& args,
 		const QStringList& env);
 
+	static QString getPluginOsSpecificName(const QString& pluginName);
+
 signals:
 	void error(QString e);
 	void downloadNext();
diff --git a/src/gui/src/SettingsDialog.cpp b/src/gui/src/SettingsDialog.cpp
index 7f6318a5..04e83c79 100644
--- a/src/gui/src/SettingsDialog.cpp
+++ b/src/gui/src/SettingsDialog.cpp
@@ -18,6 +18,7 @@
 
 #include "SettingsDialog.h"
 
+#include "PluginManager.h"
 #include "CoreInterface.h"
 #include "SynergyLocale.h"
 #include "QSynergyApplication.h"
@@ -30,6 +31,8 @@
 #include <QFileDialog>
 #include <QDir>
 
+static const char networkSecurity[] = "ns";
+
 SettingsDialog::SettingsDialog(QWidget* parent, AppConfig& config) :
 	QDialog(parent, Qt::WindowTitleHint | Qt::WindowSystemMenuHint),
 	Ui::SettingsDialogBase(),
@@ -57,10 +60,7 @@ SettingsDialog::SettingsDialog(QWidget* parent, AppConfig& config) :
 	m_pCheckBoxElevateMode->hide();
 #endif
 
-	QString pluginDir = m_CoreInterface.getPluginDir();
-	QDir dir(pluginDir);
-	int fileNum = dir.entryInfoList(QDir::NoDotAndDotDot|QDir::AllEntries).count();
-	if (fileNum == 0) {
+	if (!PluginManager::exist(networkSecurity)) {
 		m_pGroupNetworkSecurity->setEnabled(false);
 		m_pCheckBoxEnableCrypto->setChecked(false);
 	}