[python-win32] How to reload ShellExtension?

[aurora]

I am working with the ShellExtension context menu sample:

win32comext\shell\demos\servers\context_menu.py

My question after I change the code, how to I get it reloaded?  
--unregister and then --register won't do it. I have to log off and then  
log back in.

Thanks for your help,

wy