Alibre Design Mobility Upgrade: give access to the concurrent license.
Your Regular License allows you to put the software on as many computers as you want – but only one can be active at a time per license. To switch between computers, you will release the license on the first computer and then license the next computer. This license is ideal for situations where each software seat is mostly used by one person and that person doesn't need to switch computers repeatedly.
The Mobility Upgrade is for people who switch computers often. It's a one-time upgrade cost and automates the process of unlicensing computer A and licensing computer B. This upgrade requires you to have consistent Internet access.