[KevinH]

Indeed. Bulk loading of epubs like that was never meant to be. The older versions are your best bet. The separate warning message boxes were actually interfering with restoring the proper Sigil MainWindow and DockWidgets sizes at times. By catching them all and delaying them until after the MainWindow has been activated it prevented that interference.

So we won't be going back. I might think about a "dismiss all" button being added but not fixing these warnings can result in errors that could cause problems for Sigil.