I used to have the same problem. I updated my version without uninstalling the previous version, and I believed that was the culprit. Once I did so, and Installed a fresh copy of version 2.2.8 the problem went away.
Now, do not forget to go into your program files/vso/ and erase also the vso folder. Reboot and install a fresh copy. I hope this helps because it certainly helped me.