InaSAFE 3.5 had been deprecated since early 2017 so it was important to upgrade it in GeoSAFE to stay in line with InaSAFE desktop. This was a major upgrade that involved back and front-end refactoring to accommodate and take advantage of the major changes from 3.5 to 4.4.
One of the many advantages is that you no longer need to export v4 keywords to 3.5 but can create them in desktop InaSAFE and upload them to GeoSAFE as is.