In order to install the DNNInfoAllModules. You need to login as super account. Once login, go to the left panel menu and look for Settins > Extensions.

In the Extensions page. Click the Install Extension button located on the top right hand side. 

Then choose the installation file (.zip file). You can drag and drop or you can click the blue box to install the module.

The package information will be displayed. So you can review what sort of module you are going to install. Click the Next button to process to the next step.

The next step will review the release notes. Click the Next button to process to the next step.

The next step is to review the license information. Click the Next button to process to the next step.

If the installation is completed. You should see the following  screenshot.