Well,
I found the parameter which changes sort order by date in the format YYYY-MM-DD, just add the following (assuming you have 3 columns) to the init.php after line 210:
"aoColumns": [
{"sType": "date-euro"},
{"bSortable": true},
{"bSortable": true}
]
To change alphabetical sorting just replace
{"sType": "date-euro"},
with
{ "asSorting": [ "desc" ] },
Hope that helps. You can find more info here: https://www.datatables.net/usage/columns. Notice that changes in init.php apply to all tables you create using the plugin.
Cheers,
Tim