Does it crash or go unresponsive?
If it crashes, there should be a dump file in Toribash folder (with .dmp or .mdmp extension), please upload that here so I can investigate.
If it goes unresponsive, please upload your replaycache.dat file from your replay folder here, then try deleting it and opening replays screen again.
If it gets stuck again, chances are there's some replay with corrupted data - ideally I'll need the folder where it gets stuck so I can see which replay exactly causes it.