Double clicking on VPN Icon brings up password manager

The VPN io in the system tray brings up the password manager rather than the VPN screen.
avast ver 18.6.2349 (build 18.6.3983.0)

Try the following: Repair Avast:
Control Panel> Program and Features (Add/remove program)>Select Avast> Select Repair. Reboot when completed
https://www.avast.com/faq.php?article=AVKB204

If Repair doesn’t fix the problem, try the following:
Clean Install of Avast:
https://goo.gl/4Ptzkf
If you need additional help with the Clean Install, watch this:
https://youtu.be/p-h3myRD51A

these do not work

I’ve reported the bug to Avast.
What you can do is remove the Secureline component and replace it
with the freestanding product. https://www.avast.com/en-us/secureline-vpn#pc
Eventually the product will only be available via the freestanding module.

This bug will be fixed in the next version update. The recommendation is still to remove the
component from within Avast and install the freestanding version.