HTML5 Slideshow says it is not a DW 64 bit application. It is required as part of a Bootstrap 3 template. Can I still use it on a 64 bit? When will it be supported.

Hello Norman,
The HTML5 Slideshow works fine in 64bit DW CC 2014, except the image resize option. You will need to resize your images before adding them into the slideshow, that's why you see this warning.
There is an update coming soon, that improves the 64bit compatibility.