You can either automate this or check each addon individually. You may be prompted to reinstall some addons that the manager is unsure of. Once done, Instawow will attempt to pair your addons to their relevant sources. When you first launch Instawow, you'll be prompted to enter a profile name for your addons, after which you'll need to browse to your addon folder to link it. That said, it functions just as well as the other managers on this list once set up.
Requiring a couple of steps to install and configure, Instawow is probably the least intuitive of these addon managers to use.
