Seem to have overseen something.
Please call sublime.run_command("refresh_theme_cache")
from console once.
EDIT:
This command is called by Theme Menu Switcher in the plugin_loaded()
function, which is called right after Sublime Text is ready loading all plugins. Seems like Sublime Text ignores that call right after startup.
Note:
Theme Menu Switcher hides the default menu items and adds its own ones. Theme Menu Switcher intends to replace the core UI module in order to avoid confusion with duplicated menu/command pallet entries.
For now it adds a Theme and Color Scheme sub menu as know from the previous ST builts. We might discuss whether to drop that and add static menu items which point to the quick panels or not.