This is not a Thingworx extension but rather a starter kit. When you unzip the downloaded package, you can see the contents, including the guide:
Also please keep in mind the support note on the marketplace for this kit:
"This item has been tested and certified by ThingWorx to successfully work with the ThingWorx platform, however this item is not currently supported by ThingWorx. By utilizing this item you acknowledge that the content is provided in ‘as-is’ condition and support will not be provided."
Thanks for your reply. As per this document we don't have to import any extensions it seems. In my ThingWorks worksop our trainer told us that if you are downloading any extensions from Market place you have to import that in your thingworks composer. Because while performing on Tweeter extension we have imported that extension on composer. Similarly I have downloaded the extension for Libelium meshlium. In that same folder this mentioned pdf is available.
can you please explain why Import is not required?
mean while I will try without import as per your suggestion and will get back to you soon.