You can try following - open up header.php and replace:
if(!empty($avia_config['slide_output']))
{
echo "<!-- ####### SLIDESHOW CONTAINER ####### -->";
echo "<div id='slideshow_big' class='slideshow_color container_wrap ".avia_is_dark_bg('slideshow_color', true)."'><span class='top_stripe_shadow'></span>";
echo "<div class='container'>".$avia_config['slide_output']."</div></div>";
$big_slider_class = "big_slider_active";
}
with:
if(!empty($avia_config['slide_output']) && !(is_home() || is_front_page()))
{
echo "<!-- ####### SLIDESHOW CONTAINER ####### -->";
echo "<div id='slideshow_big' class='slideshow_color container_wrap ".avia_is_dark_bg('slideshow_color', true)."'><span class='top_stripe_shadow'></span>";
echo "<div class='container'>".$avia_config['slide_output']."</div></div>";
$big_slider_class = "big_slider_active";
}
else if(is_home() || is_front_page())
{
echo "<!-- ####### SLIDESHOW CONTAINER ####### -->";
echo "<div id='slideshow_big' class='slideshow_color container_wrap ".avia_is_dark_bg('slideshow_color', true)."'><span class='top_stripe_shadow'></span>";
echo "<div class='container'>".putRevSlider( "alias" )."</div></div>";
$big_slider_class = "big_slider_active";
}
Make sure that the putRevSlider( "alias" ) function returns some (valid) html code.