Vlk
7
You want it, you got it.
Open the file \DefTasks.xml in Notepad.
Add the following lines to the end, immediately above the statement:
<Task>
<Label>*Simple</Label>
<Job>Scan</Job>
<VirusAction>;</VirusAction>
</Task>
Save the file.
Now either restart the avast service (Control Panel, Administrative Tools, Services), or restart the computer.
That’s it. 
Take care,
Vlk