TinyMCE Image insert fails (big time)

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Tested inserting image in TinyMCE, in a fresh install of Arastta 1.3.1, in Firefox 46

Selecting, uploading and those functions seems to work fine. But when selecting the image to insert using the button, nothing happens, no image (code) is added in the editor.

Tested both advanced and basic theme.

Also tested both button and meny option to insert image. When using menu, the option to insert image is duplicated, and one of them adds the images to the menu ... lol ... ;)

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Are you sure it's solved?
I tested replacing those two files in 1.3.1 and image is still not being inserted, and the menu is still duplicated. Tested both button and menu, in Firefox and Vivaldi.

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Sorry, forget about it please. My mistake, cache issue, starting to be too late for this ... blush ...