Maxwell Render

is there a way to list all grass modifiers used in a scene to be able to safely delete them? (in Studio)

When i delete an object with a grass modifier applied (exported from Sketchup), the modifier seems to be still active somehow.
I had to delete the modifier first and then the object. Since i had replaced some objects before with a normal deletion, the scene was completely messed up (ram usage/rendertime). The only way to get a "clean" scene was a complete re-export from sketchup