Very frustrating

It worked for a few months and then all the cameras views turned completely black. There is no problem with the signal coming from the cameras as the "test" button showed no error and I can see all the cameras through Internet Explorer. It just does not work with this App. Have they updated their version lately and caused the problem. It is too bad that I cannot go back to the earlier version.

Tree appreciation about IP Cam Viewer Pro, v1.5.8