Step 1: Go to Appearance > Add New Themes, then click Upload button

Step 2: Go to browse, then select the wr-nitro.zip file

Step 3: Click “Install Now” to install Nitro

Step 4: Activate the newly installed Nitro by going to Appearance > Themes, find Nitro and click on “Activate” button

Step 5: Once Nitro is activated, you will be redirected to Nitro Welcome Screen. Switch to Plugins tab to install plugins

Step 6: click “Install” to begin installing plugins. After that, you will have to activate plugins.