This product was first time installed onto my computer ca. year 2000. I have developed a power grid analyzer / simulator using human interface and documentation of results by Visual Basic 6. I had no chance to transform to .Net so the solution was to continue with Windows 2000 run on Oracle VirtualBox. I chose ActiveTreedPlus from the start - it was not the chance to remove them and go back to pure VB6. I am still glad that got it working and that I can go on using the program system.