A Simplify3D license is an agreement between Simplify3D and the individual defined as the licensee. The license to the software is only to be accessed by the licensee. Usage by that licensee is defined in the post quoted below.
Installation: The software can be installed on up to 2 computers that you personally own and use.
Usage: You can use the software on 1 computer at a time.
For example, if you had a laptop and a desktop, you could install the software in both locations, but you should only use the software in 1 location at a time.
Please note: Simplify3D licenses are sold as individual user licenses. A single user license should never be shared by multiple individuals.
"A bird does not sing because it has an answer. It sings because it has a song."