diff --git a/src/blackcore/application.cpp b/src/blackcore/application.cpp
index 4f4f0fe4d..ec195efcf 100644
--- a/src/blackcore/application.cpp
+++ b/src/blackcore/application.cpp
@@ -264,11 +264,6 @@ namespace BlackCore
         return s;
     }
 
-    void CApplication::setSingleApplication(bool singleApplication)
-    {
-        m_singleApplication = singleApplication;
-    }
-
     QString CApplication::getExecutableForApplication(CApplicationInfo::Application application) const
     {
         QString searchFor;
@@ -1301,7 +1296,7 @@ namespace BlackCore
             return false;
         }
 
-        if (m_singleApplication && m_alreadyRunning && !this->skipSingleApplicationCheck())
+        if (m_alreadyRunning && !this->skipSingleApplicationCheck())
         {
             this->cmdLineErrorMessage("Program must only run once", "You cannot run two or more instances side-by-side.");
             return false;
diff --git a/src/blackcore/application.h b/src/blackcore/application.h
index 95d010fdc..867906649 100644
--- a/src/blackcore/application.h
+++ b/src/blackcore/application.h
@@ -152,9 +152,6 @@ namespace BlackCore
         //! Version, name beta and dev info
         const QString &getApplicationNameVersionDetailed() const;
 
-        //! Force single application (only one instance)
-        void setSingleApplication(bool singleApplication);
-
         //! Executable names for the given applications
         QString getExecutableForApplication(BlackMisc::CApplicationInfo::Application application) const;
 
@@ -620,7 +617,6 @@ namespace BlackCore
         QCommandLineOption m_cmdSkipSingleApp { "skipsa" }; //!< Skip test for single application
         bool m_parsed = false; //!< Parsing accomplished?
         bool m_started = false; //!< Started with success?
-        bool m_singleApplication = true; //!< Only one instance of that application
         bool m_alreadyRunning = false; //!< Application already running
         std::atomic_bool m_shutdown { false }; //!< Is being shutdown?
         std::atomic_bool m_incognito { false }; //!< Incognito mode?