A new release of Puppet Explorer is out. It includes a new look which you can check out at the new public demo site:
http://demo.puppetexplorer.io/
Other highlights in this release is:
* Abort unfinished background requests when filter changes
* Show number of found nodes in node list
* Much improved mobile experience
* RPM build task, details are in README
* Tests using recorded mock data from demo site PuppetDB
* Warn if nodes haven't reported in more than X hours
Likely this is the last release that will work with PuppetDB 2.1, I expect the next release to be using the coming structured facts support in PuppetDB 2.2+