CraigB
2
Yes they should be fine together, you might want to exclude each from one another just to be safe, exclusions also help performance.
http://forums.malwarebytes.org/index.php?showtopic=10138&page=1&#entry417798 See section K
Note that you can also use the global exclusions in the avast settings and add the complete Malwarebytes folder if it’s simpler.