Bitdefender is injecting memory guard pages in the address space of applications which are never released even if the memory is freed by the application. Because of that after some time an application runs out of address space and crashes. If you want to use ContaCam avoid using Bitdefender.
Some antivirus programs are reporting threats for our software. Contaware is NOT infecting its software with viruses! First of all always download the latest program version from our site and try again. If your web browser or anti-virus still reports a problem then read this article about false positives and test the executable with VirusTotal.