diff --git a/.github/workflows/build-linux-clazy.yml b/.github/workflows/build-linux-clazy.yml
index 7aed6c8e..c9e8009d 100644
--- a/.github/workflows/build-linux-clazy.yml
+++ b/.github/workflows/build-linux-clazy.yml
@@ -17,8 +17,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - run: sudo apt update  
-      - run: sudo apt install -y clazy apt-utils build-essential wget qt6-base-dev-tools qt6-declarative-dev qt6-multimedia-dev libqt6charts6-dev libqt6datavisualization6-dev libqt6svg6-dev libqt6core5compat6-dev libopencv-core-dev libopencv-dev libqwt-qt5-6 libqwt-qt5-dev libarmadillo-dev libgl1-mesa-dev libglu1-mesa-dev
+      - run: sudo apt update
+      - run: sudo apt install -y clazy apt-utils build-essential wget qt6-base-dev-tools qt6-declarative-dev qt6-multimedia-dev libqt6charts6-dev libqt6datavisualization6-dev libqt6svg6-dev libopencv-core-dev libopencv-dev libqwt-qt5-6 libqwt-qt5-dev libarmadillo-dev libgl1-mesa-dev libglu1-mesa-dev
       - run: wget -O qwt-${{env.QWT_version}}.zip https://sourceforge.net/projects/qwt/files/qwt/${{env.QWT_version}}/qwt-${{env.QWT_version}}.zip/download?use_mirror=pilotfiber
       - run: 7z x qwt-${{env.QWT_version}}.zip
       - run: cd qwt-${{env.QWT_version}} ; /usr/lib/qt6/bin/qmake
diff --git a/.github/workflows/build-linux.yml b/.github/workflows/build-linux.yml
index e5ef47a9..be272e1a 100644
--- a/.github/workflows/build-linux.yml
+++ b/.github/workflows/build-linux.yml
@@ -19,8 +19,8 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
-      - run: sudo apt update  
-      - run: sudo apt install -y apt-utils build-essential wget qt6-base-dev-tools qt6-declarative-dev qt6-multimedia-dev libqt6charts6-dev libqt6datavisualization6-dev libqt6svg6-dev libqt6core5compat6-dev libopencv-core-dev libopencv-dev libqwt-qt5-6 libqwt-qt5-dev libarmadillo-dev libgl1-mesa-dev libglu1-mesa-dev
+      - run: sudo apt update
+      - run: sudo apt install -y apt-utils build-essential wget qt6-base-dev-tools qt6-declarative-dev qt6-multimedia-dev libqt6charts6-dev libqt6datavisualization6-dev libqt6svg6-dev libopencv-core-dev libopencv-dev libqwt-qt5-6 libqwt-qt5-dev libarmadillo-dev libgl1-mesa-dev libglu1-mesa-dev
       - run: wget -O qwt-${{env.QWT_version}}.zip https://sourceforge.net/projects/qwt/files/qwt/${{env.QWT_version}}/qwt-${{env.QWT_version}}.zip/download?use_mirror=pilotfiber
       - run: 7z x qwt-${{env.QWT_version}}.zip
       - run: cd qwt-${{env.QWT_version}} ; /usr/lib/qt6/bin/qmake
diff --git a/.github/workflows/build-windows.yml b/.github/workflows/build-windows.yml
index 8812bfe7..e63f600b 100644
--- a/.github/workflows/build-windows.yml
+++ b/.github/workflows/build-windows.yml
@@ -92,7 +92,7 @@ jobs:
         run: pip install aqtinstall
       - name: install QT
         if: steps.cache-openCV-QT.outputs.cache-hit != 'true'
-        run: aqt install-qt windows desktop ${{env.QT_version}} win64_mingw -m qtcharts qtdatavis3d qt5compat
+        run: aqt install-qt windows desktop ${{env.QT_version}} win64_mingw -m qtcharts qtdatavis3d
       - uses: actions/checkout@v4
         if: steps.cache-openCV-QT.outputs.cache-hit != 'true'
         with:
diff --git a/DFTFringe.pro b/DFTFringe.pro
index 2cb9728a..a84b5c6e 100644
--- a/DFTFringe.pro
+++ b/DFTFringe.pro
@@ -14,7 +14,7 @@ DEFINES += QAPPLICATION_CLASS=QApplication
 
 TEMPLATE = app
 
-QT += charts concurrent core core5compat datavisualization gui network opengl widgets xml
+QT += charts concurrent core datavisualization gui network opengl widgets xml
 
 qtHaveModule(printsupport): QT += printsupport
 
diff --git a/standastigwizard.cpp b/standastigwizard.cpp
index b2018da1..6bcf1c7c 100644
--- a/standastigwizard.cpp
+++ b/standastigwizard.cpp
@@ -22,7 +22,7 @@
 #include <QDebug>
 #include <counterrotationdlg.h>
 #include <QString>
-#include <QRegExp>
+#include <QRegularExpression>
 #include "surfacemanager.h"
 
 QString AstigReportTitle = "";
@@ -304,22 +304,36 @@ void define_input::compute(){
     emit computeStandAstig( this, rotationList);
 }
 
-QString getNumberFromQString(const QString &xString)
-{
 
-  QStringList l = xString.split("/");
-  QString fn = l[l.size()-1];
-  QRegExp xRegExp("(\\d+([\\.p]\\d+)?)");
-  xRegExp.indexIn(fn);
-  QString c = xRegExp.cap();
-  c.replace("p",".");
-  if (c == ""){
-      xRegExp.indexIn(l[l.size()-2]);
-      c = xRegExp.cap();
-      c.replace("p",".");
-  }
-  return c;
+/**
+ * @brief Extracts a numeric value from a given QString, replacing 'p' with '.' for decimal representation.
+ *
+ * This function splits the input string by '/' and attempts to find a number (integer or decimal)
+ * in the last segment. If not found, it checks the second-to-last segment. The number can contain
+ * digits and may use 'p' as a decimal separator, which will be replaced by '.' in the output.
+ *
+ * @param xString The input QString from which to extract the number.
+ * @return QString The extracted number as a string, or an empty string if no number is found.
+ */
+QString getNumberFromQString(const QString &xString) {
+    QStringList l = xString.split("/");
+    QString fn = l[l.size()-1];
+    static const QRegularExpression xRegExp("(\\d+(?:[\\.p]\\d+)?)");
+    QRegularExpressionMatch match = xRegExp.match(fn);
+    QString c;
+    if(match.hasMatch()) {
+        c = match.captured(1).replace("p",".");
+    } else {
+        match = xRegExp.match(l[l.size()-2]);
+        if(match.hasMatch()) {
+            c = match.captured(1).replace("p",".");
+        } else {
+            c = "";
+        }
+    }
+    return c;
 }
+
 void define_input::browse(){
 
     QStringList fileNames = QFileDialog::getOpenFileNames(this,