Fixing bug with not saving preferences

You have this bug if:
Welcome screen is shown on every VOX launch or preferences are not saved between VOX launches.
Sometimes appears on Mavericks after app update.

Steps to fix this bug:
1. Close VOX if it's opened.
2. Open Terminal app
3. Perfrom command : killall -SIGTERM cfprefsd
4. Open VOX and use it normally.

If this doesn't help, try to log out and log in again.