Hello Krisztina,

I am very sorry but the answer is now. The licence key has to be registered with a single email when you install and it may not be used on two different computers at the same time. You can install on two different computer (ex.home and office) but they can not be used at the same time.

You can if you wish, purchase a multilicence, this will give you the chance to install on and register with two different emails therefore two of you will be able to use it.
I hope this helps!