For endpoint client settings, from the EAC:
Computer Catalog > Properties (i.e. Modify computer group...) > Policies: avast! Antivirus > Troubleshooting:
Check/uncheck "Do not use Chrome as avast! default browser" option.
For the EAC itself, in the root EAC settings or elsewhere, I could not figure out how to prevent the EAC from forcing me to use Chrome. This only affects endpoint client application, as far as I can tell.
I cannot find the "Network" option in the EAC. Where should I be looking?
[edit:] Maybe this is the same option (just without a list of the possible settings to modify)?
Computer Catalog > Properties (i.e. Modify computer group...) > Policies: avast! Antivirus > Custom Ini Settings
/* Thomas */