Filtering for new models?

We have multiple coordination models that need to be updated everyweek, so that the clash detection team can convert the dgns to Navisworks.

The problem is that the coordination models are now getting so large that conversion is taking 1-2 days.

Is there a way of getting PW to filter out the unchanged files automatically? Most users will just uprev beacuse they have better things to do than compare. the files.

We do not use Design History. DH doubles the file size and we already have extended loading times due to remote data store.