The extensions can be installed on up to 2 computers at a time, you will not need to uninstall them from the other laptop unless:
1) You are not keeping it
2) you have the extensions installed on a desktop or other computer as well.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.