How to save changes in Keeweb?

How can I save changes in Keeweb? For excample when I change a passwort it is not saved.

When you hit exit (square-with-an-arrow icon in the bottom-right), it will save as part of closing out the file. There is also an option in the Settings (gear icon in the bottom-right) → Function, where you can tell it to sync on a schedule or after every change made.