Currently you can export out of Visualize as a PNG image sequences with or without alpha transparency or as a series of textured .OBJ files for use in other programs like Maya, Blender or Cinema 4D.
To export, click on the composition name to view all the scenes. Selecting a scene will show all the compositions in that scene, each of which has a small 'R' button next to it. This stands for Render, and by clicking it you will add this composition to the render queue. If you make changes to that comp you will have to re-add the comp to the queue by clicking the Take in the render queue and re-adding the comp.
Once you've selected all the compositions you wish to render, click the "Start Render Batch >>" button and sit back and relax as all the compositions you've queued up begin to render. Be careful not to press the spacebar - it cancels your render.
Export as Image Sequence
The application exports an image sequence by default. Exporting works by rendering a given composition from the perspective chosen in the camera track (what you see in "Lock to Track mode) into a series of PNG frames. The renderer uses the first camera point as an 'in point' and the last as an 'outpoint.'
Render frames are 1920x1080 by default but can be changed on the left-hand side of the app by changing the Frame Width & Frame Height Sliders. There are presets for 720P & 1080P built in below the sliders. Frames are saved into the _RenderBin/ folder underneath the main MediaBin/ (right next to _calibration). Each folder is stamped with the scene, composition and date of export so nothing will ever be overwritten.
The image sequences will be rendered out with the black background as transparent using an Alpha channel for compositing. Except when "Draw DoF" is checked it will remain black.
Export Geometry Sequence
In order to export textured OBJ files toggle Export .obj Files on the left-hand panel. This will render out a sequential series of .OBJ files and matching .PNG frames to the _RenderBin/ folder. There will be no accompanying .mtl files included but they can be imported in to Maya. There is a tutorial and import script here. Keep in mind that there is no camera tracking or perspective information embedded in these sequences as they are simply texture-able 3D files, but it does still use your first and last camera points as in & out points for the render.