diff --git a/client/amnezia_application.cpp b/client/amnezia_application.cpp
index a0776c30..585050e2 100644
--- a/client/amnezia_application.cpp
+++ b/client/amnezia_application.cpp
@@ -36,15 +36,14 @@
 #include "ui/pages_logic/protocols/ShadowSocksLogic.h"
 
 
-AmneziaApplication::AmneziaApplication(int &argc, char *argv[], bool allowSecondary,
-  SingleApplication::Options options, int timeout, const QString &userData):
-    #if defined(Q_OS_ANDROID) || defined(Q_OS_IOS)
-        QAPPLICATION_CLASS(argc, argv);
-    #else
-        SingleApplication(argc, argv, allowSecondary, options, timeout, userData)
-    #endif
-
-
+#if defined(Q_OS_ANDROID) || defined(Q_OS_IOS)
+    AmneziaApplication::AmneziaApplication(int &argc, char *argv[]):
+        AMNEZIA_BASE_CLASS(argc, argv)
+#else
+    AmneziaApplication::AmneziaApplication(int &argc, char *argv[], bool allowSecondary,
+        SingleApplication::Options options, int timeout, const QString &userData):
+    SingleApplication(argc, argv, allowSecondary, options, timeout, userData)
+#endif
 {
     setQuitOnLastWindowClosed(false);
     m_settings = std::shared_ptr<Settings>(new Settings);
@@ -59,6 +58,9 @@ AmneziaApplication::~AmneziaApplication()
 
     QObject::disconnect(m_uiLogic, 0,0,0);
     delete m_uiLogic;
+
+    delete m_protocolProps;
+    delete m_containerProps;
 }
 
 void AmneziaApplication::init()
@@ -112,7 +114,7 @@ void AmneziaApplication::init()
     if (m_parser.isSet("a")) m_uiLogic->showOnStartup();
     else emit m_uiLogic->show();
 #else
-    uiLogic->showOnStartup();
+    m_uiLogic->showOnStartup();
 #endif
 
     // TODO - fix
@@ -144,7 +146,6 @@ void AmneziaApplication::registerTypes()
     qRegisterMetaType<PageProtocolLogicBase *>("PageProtocolLogicBase *");
 
 
-
     declareQmlPageEnum();
     declareQmlProtocolEnum();
     declareQmlContainerEnum();
@@ -152,11 +153,11 @@ void AmneziaApplication::registerTypes()
     qmlRegisterType<PageType>("PageType", 1, 0, "PageType");
     qmlRegisterType<QRCodeReader>("QRCodeReader", 1, 0, "QRCodeReader");
 
-    QScopedPointer<ContainerProps> containerProps(new ContainerProps);
-    qmlRegisterSingletonInstance("ContainerProps", 1, 0, "ContainerProps", containerProps.get());
+    m_containerProps = new ContainerProps;
+    qmlRegisterSingletonInstance("ContainerProps", 1, 0, "ContainerProps", m_containerProps);
 
-    QScopedPointer<ProtocolProps> protocolProps(new ProtocolProps);
-    qmlRegisterSingletonInstance("ProtocolProps", 1, 0, "ProtocolProps", protocolProps.get());
+    m_protocolProps = new ProtocolProps;
+    qmlRegisterSingletonInstance("ProtocolProps", 1, 0, "ProtocolProps", m_protocolProps);
 }
 
 void AmneziaApplication::loadFonts()
diff --git a/client/amnezia_application.h b/client/amnezia_application.h
index e0dfbc3a..c665ffef 100644
--- a/client/amnezia_application.h
+++ b/client/amnezia_application.h
@@ -13,13 +13,12 @@
 #include "ui/uilogic.h"
 #include "configurators/vpn_configurator.h"
 
-#if !defined(Q_OS_ANDROID) && !defined(Q_OS_IOS)
-  #define AMNEZIA_BASE_CLASS SingleApplication
-  #define QAPPLICATION_CLASS QGuiApplication
-  #include "singleapplication.h"
-  //#undef QAPPLICATION_CLASS
+#if defined(Q_OS_ANDROID) || defined(Q_OS_IOS)
+  #define AMNEZIA_BASE_CLASS QGuiApplication
 #else
-  #define AMNEZIA_BASE_CLASS QApplication
+  #define AMNEZIA_BASE_CLASS SingleApplication
+  #define QAPPLICATION_CLASS QApplication
+  #include "singleapplication.h"
 #endif
 
 class AmneziaApplication : public AMNEZIA_BASE_CLASS
@@ -47,6 +46,9 @@ private:
     std::shared_ptr<VpnConfigurator> m_configurator;
     std::shared_ptr<ServerController> m_serverController;
 
+    ContainerProps* m_containerProps;
+    ProtocolProps* m_protocolProps;
+
     QTranslator* m_translator;
     QCommandLineParser m_parser;
 
diff --git a/client/client.pro b/client/client.pro
index 996521d1..15702755 100644
--- a/client/client.pro
+++ b/client/client.pro
@@ -2,7 +2,6 @@ QT += widgets core gui network xml remoteobjects quick svg
 
 TARGET = AmneziaVPN
 TEMPLATE = app
-#CONFIG += console
 
 CONFIG += qtquickcompiler
 CONFIG += qzxing_multimedia \
@@ -287,7 +286,7 @@ android {
 }
 
 ios {
-    message("Client ios build")
+    message("Client iOS build")
     CONFIG += static
     CONFIG += file_copies
 
diff --git a/client/secure_qsettings.cpp b/client/secure_qsettings.cpp
index 488feb49..547326df 100644
--- a/client/secure_qsettings.cpp
+++ b/client/secure_qsettings.cpp
@@ -32,6 +32,8 @@ SecureQSettings::SecureQSettings(const QString &organization, const QString &app
 
 QVariant SecureQSettings::value(const QString &key, const QVariant &defaultValue) const
 {
+    QMutexLocker locker(&mutex);
+
     if (m_cache.contains(key)) {
         return m_cache.value(key);
     }
@@ -76,6 +78,8 @@ QVariant SecureQSettings::value(const QString &key, const QVariant &defaultValue
 
 void SecureQSettings::setValue(const QString &key, const QVariant &value)
 {
+    QMutexLocker locker(&mutex);
+
     if (encryptionRequired() && encryptedKeys.contains(key)) {
         if (!getEncKey().isEmpty() && !getEncIv().isEmpty()) {
             QByteArray decryptedValue;
@@ -103,6 +107,8 @@ void SecureQSettings::setValue(const QString &key, const QVariant &value)
 
 void SecureQSettings::remove(const QString &key)
 {
+    QMutexLocker locker(&mutex);
+
     m_settings.remove(key);
     m_cache.remove(key);
 
diff --git a/client/secure_qsettings.h b/client/secure_qsettings.h
index b36de1eb..ea6da106 100644
--- a/client/secure_qsettings.h
+++ b/client/secure_qsettings.h
@@ -3,6 +3,9 @@
 
 #include <QSettings>
 #include <QObject>
+#include <QMutex>
+#include <QMutexLocker>
+
 
 constexpr const char* settingsKeyTag = "settingsKeyTag";
 constexpr const char* settingsIvTag = "settingsIvTag";
@@ -40,6 +43,7 @@ private:
 
     const QByteArray magicString { "EncData" }; // Magic keyword used for mark encrypted QByteArray
 
+    mutable QMutex mutex;
 };
 
 #endif // SECUREQSETTINGS_H
diff --git a/client/settings.cpp b/client/settings.cpp
index 21deb0bd..58695f60 100644
--- a/client/settings.cpp
+++ b/client/settings.cpp
@@ -295,60 +295,10 @@ void Settings::removeVpnSites(RouteMode mode, const QStringList &sites)
     setVpnSites(mode, sitesMap);
 }
 
-//void Settings::addVpnForwardSite(const QString &site, const QString &ip)
-//{
-//    auto sites = vpnForwardSites();
-//    QStringList l = sites.value(site).toStringList();
-//    if (!l.contains(ip)) {
-//        l.append(ip);
-//        setVpnForwardSites(sites);
-//    }
-//}
-
-//QStringList Settings::getVpnForwardIps() const
-//{
-//    QStringList ips;
-//    const QVariantMap &m = vpnForwardSites();
-//    for (const QVariant &v : m) {
-//        ips.append(v.toStringList());
-//    }
-//    ips.removeDuplicates();
-//    return ips;
-//}
-
-//void Settings::addVpnExceptSite(const QString &site, const QString &ip)
-//{
-//    auto sites = vpnExceptSites();
-//    QStringList l = sites.value(site).toStringList();
-//    if (!l.contains(ip)) {
-//        l.append(ip);
-//        setVpnExceptSites(sites);
-//    }
-//}
-
-//QStringList Settings::getVpnExceptIps() const
-//{
-//    QStringList ips;
-//    const QVariantMap &m = vpnExceptSites();
-//    for (const QVariant &v : m) {
-//        ips.append(v.toStringList());
-//    }
-//    ips.removeDuplicates();
-//    return ips;
-//}
-
 QString Settings::primaryDns() const { return m_settings.value("Conf/primaryDns", cloudFlareNs1).toString(); }
 
 QString Settings::secondaryDns() const { return m_settings.value("Conf/secondaryDns", cloudFlareNs2).toString(); }
 
-//void Settings::setServerCredentials(const ServerCredentials &credentials)
-//{
-//    setServerName(credentials.hostName);
-//    setServerPort(credentials.port);
-//    setUserName(credentials.userName);
-//    setPassword(credentials.password);
-//}
-
 ServerCredentials Settings::defaultServerCredentials() const
 {
     return serverCredentials(defaultServerIndex());
diff --git a/client/settings.h b/client/settings.h
index fc575329..aa32cb0e 100644
--- a/client/settings.h
+++ b/client/settings.h
@@ -8,7 +8,6 @@
 #include <QJsonDocument>
 #include <QJsonArray>
 #include <QJsonObject>
-#include <QMutex>
 
 #include "core/defs.h"
 #include "containers/containers_defs.h"
@@ -27,7 +26,6 @@ public:
 
     ServerCredentials defaultServerCredentials() const;
     ServerCredentials serverCredentials(int index) const;
-    //void setServerCredentials(const ServerCredentials &credentials);
 
     QJsonArray serversArray() const { return QJsonDocument::fromJson(m_settings.value("Servers/serversList").toByteArray()).array(); }
     void setServersArray(const QJsonArray &servers) { m_settings.setValue("Servers/serversList", QJsonDocument(servers).toJson()); }
@@ -117,7 +115,7 @@ public:
 
 private:
     SecureQSettings m_settings;
-    QMutex m_mutex;
+
 };
 
 #endif // SETTINGS_H