If the default_wallet file still exists on the old user's profile then you can copy this file into the use profile of the other user on your computer, and the wallet should load, along with labels and the same password.

If for some reason you are unable to move this file, and/or there is some other issue with the file, then you can click on "- Restore an existing wallet from its seed" and enter the recovery seed that you (hopefully) wrote down when you first created your wallet.

You can delete your wallet file every time you close electrum, and then restore your wallet from its seed every time you open it, however this is not something I would suggest doing because it would mean that you need to frequently access one of your backups which increases your risk of loss of bitcoin