diff --git a/.vscode/settings.json b/.vscode/settings.json
index cd7e903..e3aa522 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -17,19 +17,19 @@
                 "ignoreFailures": true
             }
         ],
-        "visualizerFile": "${workspaceRoot}/.vscode/qt6.natvis",
+        "visualizerFile": "${workspaceRoot}/.vscode/qt5.natvis",
         "args": ["127.0.0.1", "9009"]
     },
     "cmake.configureArgs": [
         "-Wno-dev"
     ],
     "cmake.environment": {
-        "QT_LIB_ROOT": "D:/Dev/Qt6/msvc2022_64",
-        "PATH": "${env:PATH};D:/Dev/Qt6/msvc2022_64/bin"
+        "QT_LIB_ROOT": "/home/yun/Qt5.14.2/5.14.2/gcc_64",
+        "PATH": "${env:PATH};/home/yun/Qt5.14.2/5.14.2/gcc_64/bin"
     },
     "cmake.configureSettings": {
         "CMAKE_PREFIX_PATH": "${env:QT_LIB_ROOT}",
-        "QT_DEFAULT_MAJOR_VERSION": "6",
+        "QT_DEFAULT_MAJOR_VERSION": "5",
         "COMPILE_GUI": "ON"
     },
     "cmake.options.statusBarVisibility": "visible",
diff --git a/CMakeLists.txt b/CMakeLists.txt
index a13b135..bd28b78 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -29,7 +29,6 @@ endif()
 if(WIN32)
 if(DEFINED XP_PLATFORM_SUPPORT)
 message(STATUS "Support Windows XP platform => ${XP_PLATFORM_SUPPORT}.")
-include_directories(${CMAKE_SOURCE_DIR}/Gui/Control)
 add_definitions(-D_WIN32_WINNT=0x0501)
 else()
 add_definitions(-D_WIN32_WINNT=0x0601)
@@ -37,6 +36,7 @@ endif()
 endif()
 
 set(CMAKE_DEBUG_POSTFIX "d")
+include_directories(${CMAKE_SOURCE_DIR}/Gui/Control)
 set(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/lib/${CMAKE_BUILD_TYPE})
 set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin/${CMAKE_BUILD_TYPE}/) 
 include_directories(${PROJECT_BINARY_DIR})
diff --git a/Gui/main.cpp b/Gui/main.cpp
index ca409a9..bbaeda8 100644
--- a/Gui/main.cpp
+++ b/Gui/main.cpp
@@ -23,12 +23,12 @@ int main(int argc, char* argv[])
     CRASHELPER_MARK_ENTRY();
 #endif
 
-    SingleApplication a(argc, argv);
-
 #if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
     QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
 #endif
 
+    SingleApplication a(argc, argv);
+
 #ifdef _WIN32
     QFont font("Microsoft YaHei", 9);
     a.setFont(font);
diff --git a/crashelper/include/crashelper.h b/crashelper/include/crashelper.h
index 6180d9c..8384b9c 100644
--- a/crashelper/include/crashelper.h
+++ b/crashelper/include/crashelper.h
@@ -48,7 +48,7 @@ void UseExceptionHandler(EXCEPTION_POINTERS* exception);
 #elif defined(LINUX_OS)
 #define CRASHELPER_MARK_ENTRY()                                                                                        \
     backward::SignalHandling sh;                                                                                       \
-    sh.register_crash_path([]() -> QString { return backward::GetCurFullLogPath(); })
+    sh.register_crash_path([]() -> std::string { return backward::GetCurFullLogPath(); })
 #endif
 
 #endif   // CRASHELPER_H
\ No newline at end of file
diff --git a/crashelper/src/crashelper.cxx b/crashelper/src/crashelper.cxx
index e68e60a..e20db7f 100644
--- a/crashelper/src/crashelper.cxx
+++ b/crashelper/src/crashelper.cxx
@@ -15,8 +15,8 @@ std::function<std::string()> backward::SignalHandling::crash_path_getter_ = null
 std::function<void(EXCEPTION_POINTERS* info)> backward::SignalHandling::crash_use_handler_ = nullptr;
 std::function<void(int sig)> backward::SignalHandling::user_sig_handler_ = nullptr;
 #else
-std::function<std::string()> crash_path_getter_ = nullptr;
-std::function<void(int sig)> user_sig_handler_ = nullptr;
+std::function<std::string()> backward::SignalHandling::crash_path_getter_ = nullptr;
+std::function<void(int sig)> backward::SignalHandling::user_sig_handler_ = nullptr;
 #endif
 
 namespace backward {