General Question with Downloading Calibre

I have a Kobo Touch and a Vox.
When downloading Calibre2 64 bit on windows 7 system, I had the option to
select Kobo Vox and Kobo.
I selected Kobo as I would use the touch model more frequently.
The first time I connected the reader (Touch) it was not recognized.
So I disconnected and looked on Calibre for the select Kobo Vox option.
Could find no option.
I uninstalled Calibre2, cleaned my registry of any Calibre notations and tried to re-install the program expecting to have the option to select device.
The option was not listed, but continued with installation.
I then connected the Vox and it was recognized (I think) as the toolbar changed and gave me the options to add a book, along with other options.
I added a book. It did an automatic conversion, and appeared in the library.
I clicked on add to device and it appeared to do so as a green check mark
appeared next to the book title.
When I went to eject the ereader it showed two drives. In my case F and H.
So I did both and unplugged USB cable.
The added book was not on the ereader (Vox).
Any help and advice on this?? Thanks