As a registered user you should use Support AT SMEStorage dot Com. The support forums are monitored but there is no SLA on when a reply will occur.
You did not need to re-register for upgrade. You can do this from My Account->Package and choose the package to upgrade to.
With the Virtual Drive, if you have installed the full set of tools, the virtual drive is not enabled be default. You need to go to the SMEStorage control panel under the SMEStorage Desktop tools in the Programs menu. On this click the "Virtual Drive integration". You can also choose to add the Windows shell integration here as well as schedule syncs.
If you have any issues please contact us at the support email for immediate response.