Do you use FTB? do you have a memory stick? if so go to files Myheritage "name of tree" copy folder to memory stick and load to tree builder. or go to manage trees "download"
Another option is to use the File > Manage projects menu in FTB
and to export a package file of the whole project, including photos.
you can then use the same menu on the new computer to import tha package.
Noam \ MyHeritage Team