Now is perfect, thanks!!

Please follow these steps below:

1.Delete the CSS codes, added by you:

#wc_show_hide_loggedin_username a {
   color: #000 !important;
}
#wc_show_hide_loggedin_username a:hover {
   color: #000 !important;
}

2. put following CSS code in the "Custom CSS code" textarea:

wc_show_hide_loggedin_username a:first-child:hover{
   color: #000 !important;
}

Please don't forget to delete all caches before checking.

Hi im using your code:

jQuery( "#wc_show_hide_loggedin_username a:first-child " ).removeAttr("href");

to remove link but i have an issue:

When im logged in, the <a> tag continues displaying but without link and the hover effect is displaying, so i change my css code to:

#wc_show_hide_loggedin_username a {
color: #000 !important;
}

#wc_show_hide_loggedin_username a:hover {
color: #000 !important;
}

But the "Exit" link loose the hover effect too. 3589

Is possible to remove <a> in username when is logged in??

Using this code you've just added class to the element:

jQuery( ".wpdiscuz-form-top-bar span a" ).addClass( "lrm-login" )

Now you'll need to add some CSS rules if you want to see the result.
For example:

.lrm-login{
    color: red !important
}

The CSS code should be added in te Dashboard > Comments > Settings > Styling > "Custom CSS Code" textarea.

Hi! Thanks for your response. Im registered a custom JS file on my website and it's loading fine, but i think the JS file is not correct.

My JS file only has this content, I don't have Javascript knowledge, sorry: 

add_action( 'wp_head', function () { ?>
<script>

jQuery( ".wpdiscuz-form-top-bar span a" ).addClass( "lrm-login" );

</script>
<?php } );

But is not doing anything

:(

You can follow this instruction:

https://www.collectiveray.com/wp/tips/add-javascript-to-wordpress

Hi, thanks for your response, but i don't know how to add JS code on my theme.

Im using Avada theme, can you help me? Thanks!

There are two following options:

1. You can use the following CSS code:

#wc_show_hide_loggedin_username a:first-child {
   color: currentColor;
   cursor: not-allowed;
   text-decoration: none;
   pointer-events: none;
}

The CSS code should be added in the Dashboard > Comments > Settings > Styling > "Custom CSS code" textarea. 

2. or you can use the following JS code:

jQuery( "#wc_show_hide_loggedin_username a:first-child " ).removeAttr("href");

The js code you should add in your active them's js files.

In any case, please don't forget to delete all caches and press Ctrl+F5 (twice) on the frontend before checking to reload the updated CSS/JS files.     

Thanks so much, i will try to do it, but i have to looking for how to do it first.

So, i have a new problem: When user is logged in, the username has a link to his profile, i've disabled profile url from plugin options but it doesn't works.

Can you help me?

Just add the following js code in your active theme's js files: 

jQuery( ".wpdiscuz-form-top-bar span a" ).addClass( "myClass" );