fix issue with database path falling back to faulty path

update logic in welcome wizard, add checks for qapplication instance

src/__init__.py

@@ -19,6 +19,11 @@ if not os.path.exists(CONFIG_DIR):
 
 
 settings = Config(f"{CONFIG_DIR}/config.yaml")
+DATABASE_DIR = (
+    app.user_config_dir if settings.database.path is None else settings.database.path
+)
+if not os.path.exists(DATABASE_DIR):
+    os.makedirs(DATABASE_DIR)
 first_launch = settings.exists
 if not os.path.exists(settings.database.temp.expanduser()):
     settings.database.temp.expanduser().mkdir(parents=True, exist_ok=True)