Ok, I think using "WP Migrate" maybe you have to replace both the URL and the path for everything to work well.
Screen Shot 2015-12-08 at 08.33.28.png
You see, at the bottom there's /home/arminunruh/… that's my file path. In case I would need to transfer my site to another server, I would need to replace that too. This php snippet is an easy way to find out the path: http://www.htaccesstools.com/articles/full-path-to-file-using-php/