[JKT]

If it works the same way as the other OmniGroup apps, you can use your single user licence, but you won't be able to use both your desktop version and laptop version at the same time. From their website:

Our licensing software allows for licenses to be installed in any of three different ways:

Network licenses are globally available to (and shared among) any users on the network.

Computer licenses are available only to users on the computer or computers where the license was installed. You can install the same license on multiple computers, thus making the license available on any of them. Computer licenses take precedence over network licenses — a computer license will be claimed if available before a network license will be claimed.

Personal licenses are available only to users who have installed the license as a personal license for their account. You can install the same license for multiple user accounts, thus making the licenses available to any of those users. Personal licenses take precedence over computer or network licenses - a personal license will be claimed if available before a computer or network license will be claimed.

You are free to choose which of these three ways you want to install any licenses you purchase, and you can change your mind at any time.