There was a new securitiy release of joomla: it's version 3.6.4, I suggest to update it.
All of our templates with name endings 3R or 3R-free are updated to joomla 3.6.4.
If you updated joomla and experienced a fatal error, it may be caused by an old version of Ari image slider, so you need to download the newest version of Ari image slider and install it. After this installation your site will probably work without problems.
To update your template, first you have to save your old template (with your modifications), then install the new version, and the old template will be overwritten. Then you have to apply your modifications again. (The best is if you have all your css modifications in the css/user.css file)