This worked for me with Adobe Edge CC 2015 (new 2016 version):
1. In the ‘Properties’ window > edit ‘Preloader’ option and insert Preloader Clip-Art
2. File > Publish Settings > Publish Target
-> (Under Web) Check ‘Piblish preload DOM as a separate file’ but make sure ‘Web’ remains unchecked.
-> Check ‘Animate Deployment Package’
-> Hit ‘Save’
3. Save file
4. Publish
