Hi,
There is currently no way to save the preferred options in the content insertion system, this could be a good idea though, I add it to our todo list.
You can edit the file administrator / components / com_acym / helpers / plugin.php and change the two "150" by the values you want near the line 851.
In the next version we will apply the modification you suggested on this line as it makes more sense to sort events by date:
$this->pageInfo->order = 'event.event_date';
Just after the line 188: parent::prepareListing();
You can add this one to invert the events listing: $this->pageInfo->orderdir = 'ASC';
This isn't a modification we will apply to the plugin as this isn't relevant to display past events in most cases.
The language files can be reloaded from the Acy configuration page, tab "Languages", please make sure to have the v6.3.1 first.
Have a nice day,
Jeremy