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.