As an alternate clipboard extender, you might consider CLCL. I see it's already in the database:
It may probably seem "ugly" interface and tricky to understand all the options, but once you have it behave as you want, it's a great timesaver.
I'm not sure about Unicode, but developer is Japanese, so I guess it should work. Website:
I see in hist website that there is a plugin for Unicode:
* fmt_unicode Ver 0.0.1 (2005/02/11)
o Unicode Text Format (Windows NT4, 2000, XP and later)