What constitutes nothing 
does a red Fritzing screen come up and then it appears to freeze? If so you just need to wait for a while. The first thing Fritzing does on load is try and update the parts directory from github, and it doesn't have a progress bar and appears to freeze. If you wait long enough (I've only seen a couple of minutes but I've heard reports of 5 minutes or more) it will eventually complete and start normally thereafter Another common problem is a complaint about missing dlls as the c runtime librarys aren't on your machine.
Peter