Please notify when mod is synchronized from library to dxp file (which refers to a mod saved in library), when the mod in library is updated.
Currently there is no notification when synchronization occurred, and dxp won't change to dirty state either so users can't notice the change of mod and don't re-save the dxp.
In this case when user opens the dxp offline (e.g. saved locally) next time, the old version mod is still being used.