On my recent trip to Beijing I took a number of 3D images, quite a few of which were portrait instead of landscape. For example, here is a 3D view of some building decoration in the Forbidden City.
It seemed daft to have to rotate the images before loading them into 3DAssembler so on the flight home I implemented the required functionality. So today sees the release of v2.1.0 of 3DAssembler which includes the ability to produce portrait as well as landscape views and also sees a fix to a rather nasty memory leak. Enjoy!