I might be losing my mind, but I remember being able to select multiple modules, right click, select "Upload", and the resulting dialog showed the uploadable parameters from ALL of the selected modules. Now (Version 15.LTS) I am only allowed to upload from one module at a time. If I select multiple modules (and all of them have uploads available), the contextual menu changes and doesn't even show "Upload" as an option.
I cannot properly put into words the magnitude of this loss in functionality. If this is truly the path forward, it is proof of yet another major company actually making their products worse when they think they are improving.
I figured it out. You have to right click on the "Assigned Modules" of the controller. This will bring up a contextual menu that allows you to upload. The resulting dialog is what I remember.