First confirm what VPS version you have as I mentioned in Reply #62:
Confirm what VPS version you have, right click the avast 'a' icon, select about avast ?
If you have the latest one then a reinstall is unlikely to change that fact, but first try a repair of avast. Add Remove programs, select 'avast! Anti-Virus,' click the Change/Remove button and scroll down to Repair, click next and follow. This has in the past resolved this out of sync issue between reported and actual VPS version.