you can do that via filter in your child-theme functions.php:

add_filter('avf_logo_link','av_change_logo_link');
function av_change_logo_link($link){
    $link = "https://kriesi.at";
    return $link;
}

_____________________
by the way: there are a few filters to manipulate the logo:

function avf_change_logo_title($title) {
   $title = "The new Title is here";
   return $title;     
}
add_filter('avf_logo_title', 'avf_change_logo_title');

function avf_change_logo_alt($alt) {
   $alt = "New Alternate Text Here";
   return $alt;     
}
add_filter('avf_logo_alt', 'avf_change_logo_alt');

function avia_new_logo_tag(){
    $output = "div";
return $output; 
}
add_filter('avf_logo_headline','avia_new_logo_tag');

see: https://kriesi.at/documentation/enfold/logo/#customization

you can use the font-icons for it
f.e.:

.avia_mega_div ul li ul li:before {
    content: "\e885";   /*** or \e897  ***/
    position: absolute;
    font-family: entypo-fontello;
}

guess you then have to position it a bit – and you can play with font-size and line-height etc. and even have different color than the text besides.

svgs do have on default for WordPress a width and height of zero “0”

Therefore, one must then assign a width to the logo. This can be a very large value and must be an absolute unit for some browsers (so % and em etc. does not work). The adjustment of the size of the logo is done via the display property of the surrounding container.

If you don’t use the option in svg support to force replacement of all svg to inline svg try:

#top .logo img {
width: 450px
}

if you have the inline svg :

#top .logo svg {
 width: 450px
}

as inline svg and shrinking header there are ways to implement the svg support too.
may i see your site?

@Yigit – and maybe you update that section: https://kriesi.at/documentation/enfold/theme-update/#update-via-ftp to something like this: https://kriesi.at/support/topic/some-hints-and-advice-to-update-enfold/#post-1056107

because having a rollback enfold folder will be nice to have – and quite a few questions here about older versions would then probably be superfluous.

It was just my intention to mention this here – because many participants say it’s not there because they don’t scroll to the bottom of the dropdown list.

PS : does the old filter still work? have you changed the backward compatible?
that new filters seems to work for both lists ( heading and content)

your error message is a classic error message if a function already exists.
So on top the name of the functions are: avia_blog_post_query_mod and bump_sticky_posts_to_top

if you use them again ( see line 1048) – it is previously declared !
rename your new entries
f.e.:

add_filter('avia_post_slide_query', 'avia_post_slide_query_mod', 10, 2);
function avia_post_slide_query_mod($query, $params) {	
	$include = array();
	$sticky = get_option( 'sticky_posts' );

	$args = array(
	  'taxonomy' => $params['taxonomy'],
	  'post__not_in' => $sticky,
	);
	$posts = get_posts( $args );

	foreach($posts as $post) {
		$include[] = $post->ID;
	}

	$include = array_merge($sticky, $include);

	// convert values of the $include from string to int
	function sti($n)
	{
		settype($n, 'int');
		return $n ;
	}

	$include = array_map("sti", $include);

	$query['post__in'] = $include;
	$query['posts_per_page'] = 6;
	$query['orderby'] = 'post__in'; // sort items based on the post__in value
	return $query;
}

__________________
by the way – there is for masonries a similar solution with filter: avia_masonry_entries_query

___________________
and maybe this post is helpful too – https://kriesi.at/support/topic/sticky-posts-in-post-slider/#post-1202275 and the next post is to have on post slides that too.
you can give to single posts that are set as sticky posts a class – to easier style them:

add_filter( 'post_class', 'add_sticky_classes', 10, 3 ); 
function add_sticky_classes( $classes, $class, $post_id ) {
    if ( ! is_sticky() ) {
        return $classes;
    }
    global $wp_query;
    $classes[] = 'stickypost-' . $post_id;
    return $classes;
}

Try in your quick css:

.html_modern-blog #top .post-entry .post-title, 
.html_modern-blog .avia-content-slider .slide-entry-title {
  font-size: 1.4em
}

but be carefull – this is only for your current blog style ( modern blog ) on the image above it is a different one.

yes Yigit – that is simple. I had not thought of that

i think he is talking about the media library view. This is not an Enfold change – but a WordPress new style.
You can try this in your child-theme functions.php:

add_filter( 'media_library_infinite_scrolling', '__return_true' );

by the way – there are some plugins that try to bring neatness to the media library by establishing a folder structure.
Firebird is one of them – and on reading the possiblities – it seems to be compatibel with enfold: https://wporg.ibadboy.net/plugins/filebird/ ( I have not tested this so far. )

The solution, which at first seemed simple to me, did not pass closer examination …

@steviger
on your logo img you got a margin set i think set by yourself in quick css – remove that and try to position it f.e. this way:

.logo img {
    top: 50%;
    -webkit-transform: translateY(-50%);
    transform: translateY(-50%);
}