LvH You can skip setting a password when you log in. It is possible to change the current password on the settings page but completely removing it is not possible when there are already one or more API keys stored in bunqDesktop. This is also updates the encryption keys for the all the API keys which were stored using the current password.
However if you want to go without a password you can simple click logout on the Login page or the logout button on the dashboard at the top right. Both will de-select your current API key and the login screen will go from looking something like this:
To this:
But that does mean you will have register new API keys or manually enter the existing ones again.