I have one SW liscense. I have SW versions 2008 through 2013.

I have three computers. One in the house, one in the garage and one laptop.

I need to install 2013 on all of them and one older version on each of them. So six instances in total. How many of these can I activate at once?

Keep in mind I'm the only one who is using the software so only one of these will be used at any given time.