Hello! You will have to make some modifications because version 1.0 does not support time formatting (this will be added in the next version).
Change line 367 of "/application/controllers/appointments.php" to
$available_hours[] = $current_hour->format('h:i A');
and comment line 395 of the same file
//sort($available_hours, SORT_STRING );
Then you will have to change the width of each time column through file "/assets/js/frontend_book.js", line 333
$('#available-hours').html('<div style="width:80px; float:left;"></div>');
and line 338
$('#available-hours').append('<div style="width:80px; float:left;"></div>');
and finally change line 466 of the same file to
+ ' ' + Date.parse((($('.selected-hour').text()) ? $('.selected-hour').text() : '00:00')).toString('HH:mm') + ':00',
If you experience issues with this let me know in order to solve them.