here is a screenshot.
It stops at 99%.

Hey Nico,

Can you provide us with your Joomla backend and FTp access so we can help you check on this?

By the way, please remember to assign your domain to your license to obtain for support in the future. You can do so by accessing your license area at http://stackideas.com/dashboard

My credentials...

Hi Nico,

I've checked your site and seeing from the error message it seems like the issue is cause by your post_max_size value inside your php.ini is being set too low as you can see from my screenshot here, http://screencast.com/t/ni6p71HaVPF . Try to increase your post_max_size value into higher value and see how it goes.