diff -up rssguard-3.7.0/pri/install.pri.orig rssguard-3.7.0/pri/install.pri
--- rssguard-3.7.0/pri/install.pri.orig	2020-07-13 11:08:38.000000000 +0200
+++ rssguard-3.7.0/pri/install.pri	2020-07-13 17:14:04.230079995 +0200
@@ -113,10 +113,6 @@ INSTALL_HEADERS = \
 ../librssguard/network-web/urlinterceptor.h \
 ../librssguard/network-web/webfactory.h \
 ../librssguard/network-web/webpage.h \
-../librssguard/qtsingleapplication/qtlocalpeer.h \
-../librssguard/qtsingleapplication/qtlockedfile.h \
-../librssguard/qtsingleapplication/qtsingleapplication.h \
-../librssguard/qtsingleapplication/qtsinglecoreapplication.h \
 ../librssguard/services/abstract/accountcheckmodel.h \
 ../librssguard/services/abstract/cacheforserviceroot.h \
 ../librssguard/services/abstract/category.h \
diff -up rssguard-3.7.0/src/librssguard/librssguard.pro.orig rssguard-3.7.0/src/librssguard/librssguard.pro
--- rssguard-3.7.0/src/librssguard/librssguard.pro.orig	2020-07-13 11:08:38.000000000 +0200
+++ rssguard-3.7.0/src/librssguard/librssguard.pro	2020-07-13 17:14:04.231079993 +0200
@@ -23,7 +23,7 @@ message($$MSG_PREFIX: lrelease executabl
 include(../../pri/build_opts.pri)
 
 DEFINES *= RSSGUARD_DLLSPEC=Q_DECL_EXPORT
-CONFIG += unversioned_libname unversioned_soname skip_target_version_ext
+CONFIG += unversioned_libname unversioned_soname skip_target_version_ext qtsingleapplication
 
 RESOURCES += ../../resources/sql.qrc \
              ../../resources/rssguard.qrc \
@@ -117,10 +117,6 @@ HEADERS += core/feeddownloader.h \
            network-web/oauth2service.h \
            network-web/silentnetworkaccessmanager.h \
            network-web/webfactory.h \
-           qtsingleapplication/qtlocalpeer.h \
-           qtsingleapplication/qtlockedfile.h \
-           qtsingleapplication/qtsingleapplication.h \
-           qtsingleapplication/qtsinglecoreapplication.h \
            services/abstract/accountcheckmodel.h \
            services/abstract/cacheforserviceroot.h \
            services/abstract/category.h \
@@ -262,10 +258,6 @@ SOURCES += core/feeddownloader.cpp \
            network-web/oauth2service.cpp \
            network-web/silentnetworkaccessmanager.cpp \
            network-web/webfactory.cpp \
-           qtsingleapplication/qtlocalpeer.cpp \
-           qtsingleapplication/qtlockedfile.cpp \
-           qtsingleapplication/qtsingleapplication.cpp \
-           qtsingleapplication/qtsinglecoreapplication.cpp \
            services/abstract/accountcheckmodel.cpp \
            services/abstract/cacheforserviceroot.cpp \
            services/abstract/category.cpp \
diff -up rssguard-3.7.0/src/librssguard/miscellaneous/application.cpp.orig rssguard-3.7.0/src/librssguard/miscellaneous/application.cpp
--- rssguard-3.7.0/src/librssguard/miscellaneous/application.cpp.orig	2020-07-13 11:08:38.000000000 +0200
+++ rssguard-3.7.0/src/librssguard/miscellaneous/application.cpp	2020-07-13 17:14:04.232079992 +0200
@@ -486,8 +486,6 @@ void Application::onAboutToQuit() {
 
   // Now, we can check if application should just quit or restart itself.
   if (m_shouldRestart) {
-    finish();
-    qDebug("Killing local peer connection to allow another instance to start.");
 
     if (QProcess::startDetached(QDir::toNativeSeparators(applicationFilePath()), {})) {
       qDebug("New application instance was started.");