If you have not yet registered your purchase on the Machinimatrix.org web site, it is time to do so. You need to register to be able to keep a permanent download link and to get your updates. At some point the transfer from the old download to the new registration process will stop working. Gaia is telling that ‘end’ will be SOON.
Also, Gaia has announced a support section of the site where users can provide assistance. See: Just Ask. You need to be registered to use this feature.