Hi Rik, I suggest you look at your pages on pingdom.com. Pages are taking between 1 to 2 minutes to download! Pingdom indicates that much of the delay is waiting to connect to your server. Remember you have free webspace on Xara's servers if you're using a current version. Upload the site to there and see if the webpage speed rendering is faster.

I have Malwarebytes installed and it shows no issues with your site.