InspireBook theme has the option to change your cover photo which will reflect on your profile.
Follow the simple steps to setup cover photo to your profile.
Goto rtMedia Settings > Media Sizes (/wp-admin/admin.php?page=rtmedia-settings#rtmedia-sizes) option tab, here you will see the Media Size Settings.
Now add width and height as 803 and 315 to set exact dimensions in Featured row, also user can check the crop checkbox to crop the image in provided width and height.
After done with above back end settings, click on Save Settings button. Also, you can use Regenerate Thumbnails plugin to regenerate images if you want to set existing (already uploaded in media library) image as cover photo.
If you want to set image which present in your album or in the activity, simply click on that image and it will be opened in light box. Hover over an image which will show Options link.
Click on Options link and select Set as Featured option. Now visit your profile, it has replace the default image with the same image you selected.
Using this option user can change easily there cover photos. Also using the same Options menu user can unset the current cover photo.