The -i and -p switches aren't required anymore on installed and portable versions

src/main.py

@@ -32,6 +32,9 @@ if system == "Windows":
  from update import updater
  stdout_temp=sys.stdout
  stderr_temp=sys.stderr
+#check if TWBlue is installed
+ if os.path.exists(paths.app_path(u"Uninstall.exe")):
+  paths.mode="installed"
 #if it's a binary version
  if hasattr(sys, 'frozen'):
   sys.stderr = open(paths.logs_path("stderr.log"), 'w')