SLP 4.3.03 is out. We found some recent issues that were introduced by the new WP 4.3. Lance wrote a new post today. I was having issues as well, the update to 4.3.02 fixed my admin side WP issues
I guess I am losing track of which problem now persists. Could you post a new topic? I will close this one now if the original issue has been resolved. I did search using your link and was able to see a map with dealer in Spain using the drop down country. I see that you have a lot of variables in the search form with the Discrete search function which may be confusing to a user (just my own observation knowing nothing of your audience) if you do not know exactly which you are looking for (such as CP-aerial, but then you also need to drop down h country etc)
I will close this topic for now, You can open another if you still have issues with your admin side.