I opened an assembly to edit it.  When I was finished I closed all the parts & drawings.  Whe I closed the assembly it went to the empty SW screen but still had the file name in the upper-right.  When I open another file it brings back my assembly.  I go to Window->Close All and I get another screen (Save Modified Documents), the only doc's listed are screws, dowels and the like, which are all read only and I don't want to save read only doc's (I have that checked).  If I click Don't Save, nothing happens, if I check the doc's and click Save Selected, it says they are all read only.  How can I get rid of this assembly without shutting down SW.  Just came to 2010 from 2008 on 4/1.

Thanks,

Rob