Sorry about the delay in replying - I never saw the notification of this message.
If you just install and activate Tina MVC, it makes *no* changes to your database (other than setting some options for it's own use). When you remove Tina MVC it cleans out the options table. Of course, this changes once you start to write your own code.
If you are debugging, try:
define('WP_DEBUG',TRUE) to your wp-config.php file
- making sure
$tina_mvc_app_settings->missing_page_controller_action = 'display_error' is set in your Tina MVC app_settings.php file.
Also, remember that changes to Tina MVC's app_settings.php file are only applied when you deactivate and reactivate the plugin.