i do not think that is possible
the backup that avast makes is the backup from the database with ALL settings inside it. So there is not a special option to export/backup only the tasks...
would be a neat feature in the future tho, since i can see some possibilities in this with database corruption and the possibility then to start with a clean db but dont have to import all (corruptin/old) settings but only the tasks... but i guess it will be more complex to get that done since on the background there are some settings that are possible to change and still have to start over (think of the installation directory of ADNM changing which will possibly render the deployment packages useless and with that the tasks too)