An update is downloading. Why does it take so long, and can I keep working?

An update is the whole application: about 250 to 290 MB. On a slow connection the download can take a while, and BookyAI downloads it in the background while you work. From version 1.9.19 the sidebar shows the download with its percentage; before that nothing was shown until the download had finished, which is why the update button seemed to appear very late. Keep working: when the download is complete, "Relaunch to update" appears in the sidebar. On Windows, if you close BookyAI with an update ready it asks whether to install now or later; on a Mac the update installs when you press the button, and the app reopens by itself.