I check in the avast4.ini file, and the paths that were there were those one I added so it should be ok.
D:\program files\Trillian\*
D:\program files\Trillian\*.*
D:\PROGRA~1\TRILLIAN\*
(I added more than one because it was not working, so I made a few different tries).
I checked the "show detailed info on performed action" case, but it shows nothing when scanning logs, only when I open a new software or file manually, but I know Avast scans the logs since the blue icon is moving when I receive or send a message.