Upgrading from NIS 2009 to NIS 2010

Hi

I tried upgrading my NIS from 2009 to 2010

but I get the Error: "The language set of this upgrade does not match that of the currently installed product" message 

The help section it refered me to says I should uninstall 2009 then install 2010  http://www.symantec.com/norton/support/kb/web_view.jsp?wv_type=public_web&docurl=20090731155811EN&OpenDocument&seg=hho&src=_mi&&a=&b=&e=&product=DING&version=2009&language=english&module=9999&error=26&build=Symantec

I want to know if uninstalling 2009 and installing 2010 will use up one of my license uses

I have a 3-user license and I'm going to use the other 2 soon so I don't want upgrading this one to interfere with the other 2 (which are not yet used)

Thanks 

Message Edited by montyman77 on 09-20-2009 11:54 AM