Put CSS in resources folder, so that it is properly embedded in the release. Updated requirement and release build for new UI.

pyinstaller.spec

@@ -4,7 +4,7 @@ block_cipher = None
 
 
 analysis = Analysis(
-    ['__init__.py'],
+    ['./qt_ui/main.py'],
     pathex=['.'],
     binaries=[],
     datas=[

qt_ui/main.py

@@ -37,7 +37,7 @@ if __name__ == "__main__":
     persistency.setup(sys.argv[1])
 
     css = ""
-    with open("./qt_ui/stylesheets/style.css") as stylesheet:
+    with open("./resources/stylesheets/style.css") as stylesheet:
         css = stylesheet.read()
 
     app.processEvents()

requirements.txt

@@ -1,3 +1,3 @@
-pygame
 pydcs>=0.9.3
-pyinstaller
+Pyside2>=5.13.0
+pyinstaller==3.5