[Tim Wood]

There's a blurb about this you can view from store.omnigroup.com; click the 'How our electronic licenses work.' link in the "Other Information" box at the bottom of the right sidebar.

But, the text relevant to your question is:

For instance, one person with both a laptop and a desktop computer (or, say, a home machine and an office machine) can legally install and use a single license on both computers, though not at the same time.