I can’t figure out how to change my passwords or entropy.
For Entropy: I guess you’d create a new wallet account (and transfer your funds afterwards).
Password changes have been temporarily disabeled (Releases · mobilecoinofficial/desktop-wallet · GitHub) - due to some bug afaik.
You can still facilitate a password change by importing your seed into a new account and apply the desired password during this process.
Edit: Be sure to have a backup of your entropy before trying any of this.