"locate the .vmdk file that you downloaded earlier" is ambiguous.  I downloaded a zip file (not a vmdk file) that unzipped to 4 .vmdk files.  Should I open `PegasusTutorialVM-4.3.vmdk` or `rnaseq.vdmk`  The  tutorial mentions `rnaseq.vdmk` by name, but I actually need to open `PegasusTutorialVM-4.3vmdk`