Upgrading from XFur Studio™ 2 is fairly easy. Unpack the Auto-Upgrade package included with XFur Studio 3 (make sure that XFur Studio 2 is still installed) and then add the XFurStudio_Upgrader component to the model you want to upgrade, right next to the XFur Studio Instance component from XFur Studio 2. Then, press the Auto-Upgrade button. Once done, you can safely remove both the old XFur Studio Instance component and the Upgrader component.
Below you can find a video showing the process we just described.