The add-in doesn't really do anything with project north at this point, and because of the way Revit transforms the geometry when you change project north, there are actually problems with both methods.
The add-in doesn't check for project north being different than true north on Load, so if project north is already set to be different than true north when you Load, the geometry will be aligned such that the Forma north is aligned with the project north.
If you Load the Forma data and then change project north, then the data from Forma is transformed, which can cause the satellite image on the terrain to no longer be properly aligned. Also, the add-in will think that you changed all of the geometry, and if you then use Update to send the data back to Forma, it will convert everything to meshes that are rotated compared to true north.
If you just want to bring in the Forma data for context, and aren't planning to send updates back to Forma, then you could Load the Forma data, Unlink the proposal, and then rotate project north. If you chose to bring in the satellite image, you'll need to edit the material to change the rotation to make it align properly again. We don't have a specific procedure for how to do that, unfortunately.
