Hi, I found a little error in file tpl_index_default.php at line 19:
It was :
<?php if(ZX_SLIDESHOW_STATUS == true) { ?>

But it should be with ' ', so it should be like :
<?php if(ZX_SLIDESHOW_STATUS == 'true') { ?>

Otherwise, after activating ZX Slideshow, if you want to deactivate, it will still stay on.