TiVo is basically a computer, computers slow down as their hard drives fill up and the drives need to do more work finding places to store files.

TiVo was never meant to be a place where programs are held long term, so it does not run routines like defrag to clean up the hard drive.

Menus are loaded from the hard drive so that is why they have slowed down.

Delete all of your suggestions, then all of your deleted items and see if that improves your speed.

Peter.