Hi - try this.

From the 'Content' view (left panel of OCCDB), select 'Entire Collection'. Make sure it shows 'Album Cover view' on the list (right) side of OCDDB. Then select all titles without covers (using 'Control' & left click). Then press the 'Space Bar'. This adds all these titles to a list (i.e. highlights them in yellow).

From the 'List' menu, select 'New list'.... 'from selection'. Then you can name this list, save it, and open at any time! Hope this helps....