I have just added a Ledger to my setup.
Is it possible to change an existing electrum wallet to include this hardware?
Or do I have to create a new wallet and then transfer over the network?
I would like to avoid the (currently) high fees involved in sending between addresses, if possible.

I have also noticed that since updating, the app is a little unstable.
It has crashed once.
Also the Max button in Send is not doing anything, and copy address is not working.
I checked with a text document, and even though it says "text copied to clipboard" nothing is copied.

Additionally I would suggest that the UI for Send is a little confusing.
Having the section for fees after clicking Send is non-intuitive. Users may think clicking send would initiate the transaction, rather than leading to further options.