Issues with Bridge are best resolved on our Live Support group on Facebook. We can bring our Bridge developer directly in touch with you to get this fixed up. It's significantly harder to do this on Polycount. Would you gentlemen be able to join us there?
asset importing should really be done asynchronously, so the user interface doesn't lock up and you can still use the app while things are loading...
I don't understand how Bridge is used except if your workflow is to have the downloaded zips and you are continually spawning new files from them.
For instance, if you or other staff already extracted the zipped files to your studio repository for ongoing use, and you don't want to create any new files for the assets, what do you do? How do you browse extracted content?