Yes. You will need a Pro Version. (See the comparison table)
Perhaps I didin't phrase my question appropriately; Second row from the top it says widgets are free, I have downloaded bootstrap however it's not uploading; what are the reasons?
You will be able to use the interactive widgets included for Web, iPhone, Android and iPad however with the free version you won't be able to upload any extra widgets pack.
Sorry for the inconvenience.
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