Thank you so much for your advice.
For all of you, who wants to change login link, here is example of line #82:
echo '<a href="https://yourdomain.com/">'.$login_text.'</a>';
Redirect after login function is no longer working after this elementary editation. I can’t figure out the right syntax, to keep redirect function working. Maybe plugin author could help with this.
All you have to do is download login-logout.php file from your web storage, edit line #82 with notepad++, upload edited file. You have to do this after every update of plugin.
Always make backup of login-logout.php !!!