diff --git a/kindlecomicconverter/KCC_gui.py b/kindlecomicconverter/KCC_gui.py
index ac571da8..1dbd0f30 100644
--- a/kindlecomicconverter/KCC_gui.py
+++ b/kindlecomicconverter/KCC_gui.py
@@ -1503,7 +1503,7 @@ class KCCGUI(QObject, KCC_ui.Ui_mainWindow):
         APP = kccapp
         MW = kccwindow
         GUI = self
-        settings_key = 'kcc13'
+        settings_key = 'kcc10'
         if Version(qVersion()) <= Version('6.4.3'):
             settings_key += '-legacy'
         self.settings = QSettings('ciromattia', settings_key)
diff --git a/requirements.txt b/requirements.txt
index 448cc645..ee7fce38 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
-PySide6
+PySide6; platform_system != 'Windows'
+PySide6<6.10; platform_system == 'Windows'
 Pillow>=11.3.0
 psutil>=7.2.2
 requests>=2.34.2