Unable to open Avast Premium Security

[avm-]

I hope I am posting in the right area, but for the last few days I am unable to open Avast Premium Security. A white box appears for a quick second but disappears soon after. The icon on the task bar is also telling me I am unprotected, so it is an issue I would like to get fixed soon, but I'm unable to find any helpful solutions online.

[bob3160]

Repair & Clean Install of Avast -> https://goo.gl/t7aJGq
Repair Avast:
Open the Avast User Interface > Menu > Settings > Troubleshooting > Repair App. > Restart the Computer or,
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:
If your Avast settings are not the default settings and you want them restored after the Clean Install, follow this before removing Avast.
https://goo.gl/TXjM7h
Clean Install of Avast:
https://goo.gl/4Ptzkf
If you need additional help with the Clean Install, watch this:
https://youtu.be/p-h3myRD51A