Demo/commercial installations and downloads - Q&A

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  I'm experiencing audio drop outs every 30 seconds or so.  Is this supposed to happen with demo versions of Voxengo audio plug-in software?
  I cannot test demo version of a software product because a key is needed?
  I would like to install your plug-ins, but the download files do not contain any executable files.
  Where do I download the products I paid for?
  I am setting up my new DAW, and I want to install an older version of a Voxengo plug-in, which I bought a while ago.  On the website I can only find a newer version.  Of course, when I enter my old registration details it doesn't activate.  I would be grateful if you could tell me how to download the installer for the previous version.
  Where are the "manuals" for your software products?  I see them mentioned in forums but cannot locate them.
  I cannot seem to make Voxengo plug-ins appear in Ableton Live's or other host's plug-in list.  I'm using Windows Vista.
  I'm using native Win64 audio host application (Sonar).  Which plug-in variant should I download?