In theory KC and Preferences will get migrated as part of the upgrade. This has always worked for me but others have had problems. These seem to be related to the checkbox during installation that asks about who to install Cubase for. There are several threads on the forum you can search for that go into details.
That said for both Key Commands and Preferences you can save your current settings as presets - which is a good idea in general to have. So if they didn’t migrate you could find these and load them.
There is also ‘Edit/Profile Manager’ (which I’ve never used) that is designed so you can take your environment from one DAW to another which I suspect is the easiest.
Just notice the OP is going from Elements 10 to Pro 10 and not a 9 to 10 upgrade. I think all the above might be true in that case, but not certain (likely Profiles are only in Pro). Anyway the OP should make Presets before upgrading.