To simplify the import/export options, BuildMaster 6.2 only supports backing up / restoring to a "Package Source" (i.e. a ProGet feed); we may support for using a disk-based package source instead, but for now it's only a ProGet Universal feed. BuildMaster 6.1.5 lets you back-up to a feed URL. Note that BuildMaster 6.1.25 also has "Package Sources" (as a preview feature), which you can use to back-up all of your applications if you'd like.