Hi Daniel,
After you upgrade to the latest version of Hotspot 5.1.1 I have this error 1054:

Unknown column 'm.state' in 'where clause' SQL=SELECT catid, MIN( gmlat ) AS south, MAX( gmlat ) AS north, MAX( gmlng ) AS east, MIN( gmlng ) AS west FROM `wint_hotspots_marker`AS m LEFT JOIN `wint_categories`AS c ON m.catid = c.id WHERE m.state = 1 AND c.published = 1 AND c.extension = 'com_hotspots' AND (m.publish_up = '0000-00-00 00:00:00' OR m.publish_up <= '2015-04-01 09:19:43') AND (m.publish_down = '0000-00-00 00:00:00' OR m.publish_down >= '2015-04-01 09:19:43') GROUP BY catid

What can I do to fix it?
Use: Joomla 3.4.1 + Hotspot 5.1.1

Thanks