UPDATE:
Well, i found it.
You go to wp-content/themes/plixus/js/ and open the file init.js. There you should find the following code:
$(window).load(function() {
$('#slider').nivoSlider({
effect:'fold,fade,boxRandom,sliceUpDown',
controlNav:false});
});
Now you can change the argument “effect” to whatever you like, like
$(window).load(function() {
$('#slider').nivoSlider({
effect:'fade',
controlNav:false});
});
That should do the trick.
Well, as it’s a Nivo Slider which is used, there should be some option to set the Animation type (most likely set to “random” right now). Take a look at the theme options in the backend.