How can I deselect an author's gender?
There is no specific person writing in the blog (just the name of the website is showing) so I wouldn't want to show the Greek version of saying "written by" (which also indicates the gender). There is a way doing it through language files, but I 'd prefer leave them intact as there may be an author in the future.
Thanks

You can hide the author from the options section on the right when you edit a category from the backend.

That solution would be good if I could choose a specific author to be hidden. However, maybe another author will want his/her name to be shown.

You can override the language stings of K2 or comment out the following code

Hint: It might differ a bit between item.php, category_item.php etc..

To locate these files please read: getk2.org/documentation/tutorials/174-templating-with-k2-and-the-concepts-of-sub-templates