This seems to have either been deliberate or will be implemented later. I couldn't believe it was missing when I installed the program. Thankfully all the actions surrounding the cab swapping process are much easier, so the scrolling on the profiler itself irritates me less than it otherwise would.
Open the Rig Manager "All Presets/My Profiler" folder in a new window,
Drag and drop your saved Cabs Presets into the Rigs of your choice 
Or, Drag and Drop a Cab from an existing Rig into that folder to create a new Cab preset.
Or, you can create new Cab Presets from IRs, too.
That's fine but like...couldn't they have just enabled dragging from the other rig into your current rig without needing it to be a preset 
I agree that this seems to be a big oversight.
Hopefully, it will soon be implemented...
That's fine but like...couldn't they have just enabled dragging from the other rig into your current rig without needing it to be a preset
I suspect that may come in a future version. At the moment you can achieve the same thing by right clicking on the Cab section and selecting lock all but cabinet. Now you can drag any rig you want on to the Cab block and it will only load the cab portion of the rig.
