Hi All,
To those who may not have known this yet.
I just thought I’d share this rather important finding. To those of you who are using Level Director and are importing your physics bodies from Physics Editor, please note: NEVER use underscore (_) or hyphen (-) characters in your asset filenames (eg. crate-01.png, crate_01.png) .
I have searched high and low to solve the mystery of Level Director unable to find matches when importing physics from PE. After hours of experimenting, I came to the conclusion that those characters are the culprit. LD and PE will match assets based on asset names and will skip the “.PNG”, “_png” part of the names. If you happen to have either of those characters, LD will not match the physics body.
To Retrofit Productions, this link should include this as a warning.
http://www.retrofitproductions.com/level-director/tutorial-using-texturepacker-and-physicseditor/
I cannot find any documentation that mentions this. Perhaps it could be addressed in future LD update? 
Thanks,
Santi