This year nRelate plugin for WordPress has been shut down. This has been announced so you had a lot of time to choose another plugin for related content on your sites.
In my case, I wait till my plugin stopped to work and it was on 01.01.2015.
Sadly but what you gonna do?
I decide to replace nRelate plugin with WordPress related posts.
Just want to say that WordPress related posts plugin works great and it has many possibilities for styling and other kind of setup. Most important thing is that you can customize thumbnail size and their position under the posts. Also, these thumbnails looks great even while you are browsing with mobile device. That was not the case while I was using nRelate plugin – I kept it off in mobile preview.
Hope you guys will find right replacement for your sites plugin. However I use this opportunity to recommend WordPress related posts as most better replacement.
Support for that plugin is great, and if you go and take a look you will notice how fast response you can get from plugin developer team.