Okay, missing something on install

Running ‘avastgui’ from terminal…

(avastgui:8164): Gtk-WARNING **: Unable to locate theme engine in module_path: “qtengine”,

I do have gtk-qt-engine installed. It works okay in super user mode.

please try:
AVAST_FAILSAFE=1 /path/to/avastgui

culpeper@linux:~> AVAST_FAILSAFE=1 /path/to/avastgui
bash: /path/to/avastgui: No such file or directory
culpeper@linux:~>

Also, running Avast from the menu icon of course doesn’t show any errors. I just noticed that the interface look a little different so I tried it from the terminal.

AVAST_FAILSAFE=1 /usr/bin/avastgui

is the correct command by default

culpeper@linux:~> AVAST_FAILSAFE=1 /usr/bin/avastgui

(avastgui:8183): Gtk-WARNING **: Unable to locate theme engine in module_path: “qtengine”,
culpeper@linux:~>

please, try to install gtk-qt-engine

It’s installed. It was installed before the new installation. It worked fine using the beta program. It works fine running from root shell.

which beta version number?

1.0.1