I played around with js, and got this script to work on my Oxwall installation. Not sure if Skadate is the same, but you can give it a try. Just copy, and paste it into the body section in admin / settings / page settings.

<script>
$('.ow_avatar').hover(function(){
    $('.uhint-foot .ow_bl li a').removeAttr('target');
});
</script>

Interesting. It works on my site. When I hover over an avatar, and click on "View Profile" from the hint box, it opens in the same window, but yes. The dev just needs to remove the target="_blank" from the url. It could possibly be a language thing with the script. I've noticed on some sites, with foreign languages, that the classes are also in that language.

Here is an approach where you change it in the plugin code.

1. Go to includes / config.php
  a.set dev mode at the bottom of the page to "true"
  b.click save

2.Go to ow_plugins / hint / classes /base_bridge.php
  a. On line 63 "see below"
"attrs" => array("id" => $uniqId, "href" => $url, "target" => "_blank")

  b.change the "_blank" to "_self"
  c.Click save to save your changes.

3.Go to your site, and refresh any page for the change to take affect.

4.Go back to includes / config.php
  a.set dev mode at the bottom of the page back to "false"
  b.click save

When clicking on the "view profile" from the hint pop up box; it should now open in the same window.

Note: Remember that if the plugin is updated, and this isn't part of the update, the change will revert back to the original code when the update overwrites the files, and you will need to re-apply this on each update.

Thanks Daryl. This resolves the issue.

welcome back Sergey Kambalin :)