In order to fix the problems, remove the program from your computer (Control Panel > Uninstall a program) and reboot the PC. After that, download and install its latest version from the official web page. Also, go to Start, type dxdiag and open the utility. Click the Display tab, check your video card model and download and install its latest drivers from the developer's website. Next, I recommend you configure your security program and Windows Firewall to allow the software to communicate.
