A major update is going to be ready 3/17/2020 That allows entering multiple accounts and encrypts the private keys with AES256 using a user supplied password. The user can choose the password to be saved or not. Not saving the password on app close will be highly secure as the private key and the encrypting password are never saved by the app to the registry. The user would have to enter the password each time the app is opened and remember it. I'll have another post about the features.
RE: Introducing Steem Exchanger, A Desktop App To Manage Your STEEM Account and For AutoTrading Tokens at Steem-Engine.com