To avoid problems in the future, don’t trash anything from the desktop, rather open the projects whose media you want to delete and use the “make offline” commands on the media, and use the “Render Manager” to delete render files associated with the sequences in the project.
To get around your problem now though, the first thing to try is to take ALL media offline by putting it in another folder. Then see if you can open the project file, and reconnect a few at a time, until the crash shows up. (this is the way to find media that has become corrupted). You may have trashed an “av” file that was created when you captured media that needs to be there to see all of the media.
Jerry