Screwy progress bar in Avast Mac Security for Yosemite

I tried creating a tech support ticket but after two attempts, the system is not showing any tickets.

Mac OS 10.10.1

Progress bar is always greater than 100%, actually stuck at exactly 170% for about an hour, despite files being scanned.

The screenshot says it all.

http://s14.postimg.org/u8cu2yylt/Avast_Progress_Bar.png

EDIT:

After several hours at 170%, now it’s stuck at 198%… wondering if/when this scan will ever finish… 4 hours, 20 minutes and counting.

https://forum.avast.com/index.php?topic=162433.0

Thanks. I searched for keywords “progress bar” so that one never came up.