Hello,
We use this Plugin in our project in 5.5. Thank you for this nice tool ! 
We found a bug when we use a custom collision for the “object type”.
For example, we use a Ground type for object type :
It blocks WorldStatic and WorldDynamic channel, but the function LineTraceForObjects only checks for the “Object Type” selected. And not if it blocks the given channel.
So when using another type than WorldStatic or WorldDynamic, the line trace doesn’t find the ground.
I did this, and it fix our bug :
And I wonder if this could be pushed for next releases, if it will not create unwanted issues ?
Thank you ! 