I've installed the application and it's working just fine. I have a DVR set up with 8 cameras and as soon as I installed the application, it appeared to add the necessary cameras. To add them manually, carefully read through all the details that you need to fill or you'll encounter issues.
Press on the PLUS sign then manually add the details of your cameras or through the DVR and they will appear. The cameras need to have their configuration set up as well in their Settings menu.