Would it be possible to expand this or add an additional action that add the image to the animation rather than replacing it?
Because at the moment you have to do some really silly work around to make it able to read an image file from the disk through NW.JS as it keeps overwriting the current frame, which means that if you don't know how many you need, lets say you were making a light box application for instant, you have to add a lot of empty frames and cycle through them, when adding new images so they don't get overwritten all the time.
Alternatively maybe an action that could add an empty frame to a sprite or just duplicate the last one or something like that.
Cheers