Changing multiple files media types at one time

In past versions of iTunes i have been able to select multiple files and select get into then go into options and change the media kind from one thing to another. I recently had to re-load my MBP and am rebuilding everything. I am trying to change 79 files that iTunes has classified as movies but are really tvshows but the multiple selection no longer seems to be working. I can still do it one at a time but i don't have the patient to do it 79 times.

Thanks in advance for your help and ideas.

JB