Index: pluginconf/gui.py
==================================================================
--- pluginconf/gui.py
+++ pluginconf/gui.py
@@ -61,16 +61,14 @@
     | opt_label     | bool    | Show config name= as label (instead of description)     |
     | theme         | str     | Set PSG window theme.                                   |
     | **kwargs      | dict    | Other options are passed on to PySimpleGUI              |
     | **Returns**   | True    | if updated config{} values should be [Saved]            |
     """
-    plugins = kwargs.get("plugins", {})
-    opt_label = kwargs.get("opt_label", False)
-    theme = kwargs.get("theme", "DefaultNoMoreNagging")
+    plugins = kwargs.pop("plugins", {})
+    opt_label = kwargs.pop("opt_label", False)
+    theme = kwargs.pop("theme", "")# "DefaultNoMoreNagging"
     if theme:
-        if "theme" in kwargs:
-            del kwargs["theme"]
         sg.theme(theme)
     if files:
         plugins = read_options(files)
     layout = plugin_layout(plugins.values(), config, plugin_states, opt_label=opt_label)
     layout.append([sg.T(" ")])