I began installing the DVD on my second computer. I was excited to see that it auto-synched and read in the menu icons and layouts from v4 on my primary computer. I didn't know it would do that. It was especially strange, since I'm sure I did not have v4 running on my primary computer at the time. So I'm not sure how this happened.
Next I opened v4 on my primary computer and was shocked to find that it began preparing my library for the three-stage reindexing process again! It took my all day and all night before, and now it 's starting all over again. Somehow installing the DVD version on my secondary maching caused the reindexing of the primary machine.
Now I can't run anything for another 24 hours!