Snaps not working: all boxes checked in Tools and Options

Hi All,

The snaps have stopped working, do you know if there is an issue on the latest update and it will be fixed on the next update or how to fix the issue manually? I have checked that all the snap boxes are checked in options, I have unchecked and re-checked them, re-started PC, all the usual stuff apart from uninstalling the program and re-installing, which I find a bit extreme in this instance. I've attached a PDF of the version I'm using.