If you want to exclude specific addons from updating, you'll need to click the ellipsis on the far-right of the addon row and select 'Unreconcile'. You can use the search box at the top of the window to install new addons, although you'll need to know the name of the addon you're after to get accurate results. When all this is finished, you'll be presented with a list of your installed addons. You can either automate this or check each addon individually. You may be prompted to reinstall some addons that the manager is unsure of.
Step-by-step for installing addons through Twitch: Install the Twitch app. To access addons for WoW Classic, you’ll need to select the Classic folder from the drop-down menu on the top right-hand side, which by default will be set to the retail version of the game. Once done, Instawow will attempt to pair your addons to their relevant sources. Curse Addons For Wow Classic 03/2021 : Free.
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.
