diff --git a/src/app/application.cpp b/src/app/application.cpp
index e02205995..b5783feb0 100644
--- a/src/app/application.cpp
+++ b/src/app/application.cpp
@@ -154,17 +154,11 @@ Application::Application(int &argc, char **argv)
     const QString profileDir = portableModeEnabled
         ? QDir(QCoreApplication::applicationDirPath()).absoluteFilePath(DEFAULT_PORTABLE_MODE_PROFILE_DIR)
         : m_commandLineArgs.profileDir;
-#ifdef Q_OS_WIN
-    const QString instanceId = (profileDir + (m_commandLineArgs.configurationName.isEmpty() ? QString {} : ('/' + m_commandLineArgs.configurationName))).toLower();
-#else
-    const QString instanceId = profileDir + (m_commandLineArgs.configurationName.isEmpty() ? QString {} : ('/' + m_commandLineArgs.configurationName));
-#endif
-    const QString appId = QLatin1String("qBittorrent-") + Utils::Misc::getUserIDString() + '@' + instanceId;
-    m_instanceManager = new ApplicationInstanceManager {appId, this};
-
     Profile::initInstance(profileDir, m_commandLineArgs.configurationName,
                         (m_commandLineArgs.relativeFastresumePaths || portableModeEnabled));
 
+    m_instanceManager = new ApplicationInstanceManager {Profile::instance()->location(SpecialFolder::Config), this};
+
     Logger::initInstance();
     SettingsStorage::initInstance();
     Preferences::initInstance();
diff --git a/src/app/applicationinstancemanager.cpp b/src/app/applicationinstancemanager.cpp
index 0feed1586..6a15f0471 100644
--- a/src/app/applicationinstancemanager.cpp
+++ b/src/app/applicationinstancemanager.cpp
@@ -28,24 +28,27 @@
 
 #include "applicationinstancemanager.h"
 
+#include <QtGlobal>
+
 #ifdef Q_OS_WIN
 #include <windows.h>
-#endif
 
 #include <QDebug>
 #include <QSharedMemory>
+#endif
 
 #include "qtlocalpeer/qtlocalpeer.h"
 
-ApplicationInstanceManager::ApplicationInstanceManager(const QString &appId, QObject *parent)
+ApplicationInstanceManager::ApplicationInstanceManager(const QString &instancePath, QObject *parent)
     : QObject {parent}
-    , m_peer {new QtLocalPeer {this, appId}}
+    , m_peer {new QtLocalPeer {instancePath, this}}
     , m_isFirstInstance {!m_peer->isClient()}
 {
     connect(m_peer, &QtLocalPeer::messageReceived, this, &ApplicationInstanceManager::messageReceived);
 
 #ifdef Q_OS_WIN
-    auto sharedMem = new QSharedMemory {appId + QLatin1String {"-shared-memory-key"}, this};
+    const QString sharedMemoryKey = instancePath + QLatin1String {"/shared-memory"};
+    auto sharedMem = new QSharedMemory {sharedMemoryKey, this};
     if (m_isFirstInstance)
     {
         // First instance creates shared memory and store PID
@@ -79,8 +82,3 @@ bool ApplicationInstanceManager::sendMessage(const QString &message, const int t
 {
     return m_peer->sendMessage(message, timeout);
 }
-
-QString ApplicationInstanceManager::appId() const
-{
-    return m_peer->applicationId();
-}
diff --git a/src/app/applicationinstancemanager.h b/src/app/applicationinstancemanager.h
index b186958ff..91ad7c2fd 100644
--- a/src/app/applicationinstancemanager.h
+++ b/src/app/applicationinstancemanager.h
@@ -32,16 +32,15 @@
 
 class QtLocalPeer;
 
-class ApplicationInstanceManager : public QObject
+class ApplicationInstanceManager final : public QObject
 {
     Q_OBJECT
     Q_DISABLE_COPY_MOVE(ApplicationInstanceManager)
 
 public:
-    explicit ApplicationInstanceManager(const QString &appId, QObject *parent = nullptr);
+    explicit ApplicationInstanceManager(const QString &instancePath, QObject *parent = nullptr);
 
     bool isFirstInstance() const;
-    QString appId() const;
 
 public slots:
     bool sendMessage(const QString &message, int timeout = 5000);
diff --git a/src/app/qtlocalpeer/qtlocalpeer.cpp b/src/app/qtlocalpeer/qtlocalpeer.cpp
index b4b329abf..70673d150 100644
--- a/src/app/qtlocalpeer/qtlocalpeer.cpp
+++ b/src/app/qtlocalpeer/qtlocalpeer.cpp
@@ -68,20 +68,16 @@
 
 #include "qtlocalpeer.h"
 
-#if defined(Q_OS_UNIX)
-#include <sys/types.h>
-#include <time.h>
-#include <unistd.h>
+#include <QtGlobal>
+
+#if defined(Q_OS_WIN)
+#include <Windows.h>
 #endif
 
-#include <QCoreApplication>
 #include <QDataStream>
-#include <QDir>
+#include <QFileInfo>
 #include <QLocalServer>
 #include <QLocalSocket>
-#include <QRegularExpression>
-
-#include "base/utils/misc.h"
 
 namespace QtLP_Private
 {
@@ -96,41 +92,14 @@ namespace QtLP_Private
 
 const char* QtLocalPeer::ack = "ack";
 
-QtLocalPeer::QtLocalPeer(QObject *parent, const QString &appId)
+QtLocalPeer::QtLocalPeer(const QString &path, QObject *parent)
     : QObject(parent)
-    , id(appId)
+    , socketName(path + QLatin1String("/ipc-socket"))
+    , server(new QLocalServer(this))
 {
-    QString prefix = id;
-    if (id.isEmpty())
-    {
-        id = QCoreApplication::applicationFilePath();
-#if defined(Q_OS_WIN)
-        id = id.toLower();
-#endif
-        prefix = id.section(QLatin1Char('/'), -1);
-    }
-    prefix.remove(QRegularExpression("[^a-zA-Z]"));
-    prefix.truncate(6);
-
-    QByteArray idc = id.toUtf8();
-    quint16 idNum = qChecksum(idc.constData(), idc.size());
-    socketName = QLatin1String("qtsingleapp-") + prefix
-                 + QLatin1Char('-') + QString::number(idNum, 16);
-
-#if defined(Q_OS_WIN)
-    DWORD sessionId = 0;
-    ::ProcessIdToSessionId(GetCurrentProcessId(), &sessionId);
-    socketName += (QLatin1Char('-') + QString::number(sessionId, 16));
-#else
-    socketName += (QLatin1Char('-') + QString::number(::getuid(), 16));
-#endif
-
-    server = new QLocalServer(this);
     server->setSocketOptions(QLocalServer::UserAccessOption);
-    QString lockName = QDir(QDir::tempPath()).absolutePath()
-                       + QLatin1Char('/') + socketName
-                       + QLatin1String("-lockfile");
-    lockFile.setFileName(lockName);
+
+    lockFile.setFileName(path + QLatin1String("/lockfile"));
     lockFile.open(QIODevice::ReadWrite);
 }
 
@@ -156,12 +125,13 @@ bool QtLocalPeer::isClient()
     // ### Workaround
     if (!res && server->serverError() == QAbstractSocket::AddressInUseError)
     {
-        QFile::remove(QDir::cleanPath(QDir::tempPath())+QLatin1Char('/')+socketName);
+        QFile::remove(socketName);
         res = server->listen(socketName);
     }
 #endif
     if (!res)
         qWarning("QtSingleCoreApplication: listen on local socket failed, %s", qPrintable(server->errorString()));
+
     connect(server, &QLocalServer::newConnection, this, &QtLocalPeer::receiveConnection);
     return false;
 }
@@ -204,11 +174,6 @@ bool QtLocalPeer::sendMessage(const QString &message, const int timeout)
     return res;
 }
 
-QString QtLocalPeer::applicationId() const
-{
-    return id;
-}
-
 void QtLocalPeer::receiveConnection()
 {
     QLocalSocket* socket = server->nextPendingConnection();
diff --git a/src/app/qtlocalpeer/qtlocalpeer.h b/src/app/qtlocalpeer/qtlocalpeer.h
index 51954cfc2..9e4ceee90 100644
--- a/src/app/qtlocalpeer/qtlocalpeer.h
+++ b/src/app/qtlocalpeer/qtlocalpeer.h
@@ -68,21 +68,23 @@
 
 #pragma once
 
+#include <QString>
+
 #include "qtlockedfile.h"
 
 class QLocalServer;
 
-class QtLocalPeer : public QObject
+class QtLocalPeer final : public QObject
 {
     Q_OBJECT
+    Q_DISABLE_COPY_MOVE(QtLocalPeer)
 
 public:
-    QtLocalPeer(QObject *parent = nullptr, const QString &appId = QString());
+    QtLocalPeer(const QString &path, QObject *parent = nullptr);
     ~QtLocalPeer() override;
 
     bool isClient();
     bool sendMessage(const QString &message, int timeout);
-    QString applicationId() const;
 
 signals:
     void messageReceived(const QString &message);
diff --git a/src/app/qtlocalpeer/qtlockedfile.h b/src/app/qtlocalpeer/qtlockedfile.h
index f17eeb04f..53852d225 100644
--- a/src/app/qtlocalpeer/qtlockedfile.h
+++ b/src/app/qtlocalpeer/qtlockedfile.h
@@ -71,6 +71,7 @@
 #include <QFile>
 
 #ifdef Q_OS_WIN
+#include <QString>
 #include <QVector>
 #endif