Welcome 8)
In fact, it will be better on avast 4.x Home/Pro board 
This is only for the betas…
Which is your operational system?
Can’t you set the ashMaiSv.exe (a Windows service) to ‘disable’?
If you’re using Windows 98, can you make your changes, stop avast and then boot?
Go to Control Panel > Add/Remove programs > avast! antivirus > Remove
Then choose Change function in the popup window
See if the providers are correctly added.