There's not an easy way to do it, but if you're happy customizing the PHP:
1. Add a rule in $qa_routing at the top of qa-page.php which maps:
'answered' => QA_INCLUDE_DIR.'qa-page-home.php',
2. Copy the function qa_db_unanswered_qs_selectspec(...) in qa-db-selects.php to a new function qa_db_answered_qs_selectspec, and make the simple change of:
acount=0
... to ...
acount>0
3. Add a rule in the big switch {...} in qa-page-home.php which is an exact copy of the 'questions' rule, but substitute qa_db_unanswered_qs_selectspec for qa_db_answered_qs_selectspec.
4. In your new rule in qa-page-home.php, change the language phrases (which start main/...) for something else, and add those language phrases.
5. You'll also need to fix the $count variable in this section by subtracting the current value (which will be the unanswered questions count) from the total number of questions - see how that's retrieve in qa-page-admin-stats.php.
I haven't tried this though, so let us know how you get on!