Library changes not sync'd to filesystem

Does anyone know if there is a trick to this…?

I’ve tried to delete some unused drawings to tidy up a fairly large ToonBoom project. I delete the unused Drawing elements from the ToonBoom library window:
Library/Animation/Scene-1 folder…

However, if I check matching filesystem folder:
SomeProject\Scene-001\Drawing

the files are still there. Is there a step I’m missing here?

Hi EngUSA,

I believe this was resolved already with you by support. As mentioned, you have to manually delete drawings from your filesystem, since they are kept there to avoid accidental loss of assets.