support how to use the add-on

Hello community, I donwloaded (thanks for that) the XenForo.v2.2.12.PHP.NULL-DGT and installed locally without any issue. This is my first time with XenForo, and I like it. Now, I'm trying to install some AddOns downloaded here: Add-ons [2.x]. I installed some of them from admin pannel, and I...