Re-installing Virtuemart Component won't effect our VM Template, as our VM Template is stored in independent location from Virtuemart.
JoomlaROOT/templates/<yourjoomlatemplatefolder>/html/com_virtuemart/
If you don't see the Virtuemart Component in the component list of your Joomla Backend, i really don't know what is going on with Virtuemart but I am 100% sure this has nothing to do with our VM Template. As i Said, our VM Teplate stored in independent location from Virtuemart.
Try to re-install the Virtuemart Component. And make sure to apply our VM Template correctly, carefully read and follow the TUTORIAL.PDF
Regards.
Forum Support.