Prevent a user accessing another user's list of tables.
Options to show extra time before or after lessons.
More bug fixes. Key shortcuts for Update (space bar), Select all (a), Fix selected (f), Unfix selected (u) and Delete selected (delete).
Rotation options 'period' and 'margin'. The latter either allows lessons to overlap on different weeks, or to be separated by a gap.
By default, updating no longer updates past lessons. This can be changed under 'Don't update past lessons'
Selected lessons are transparent. Fixed lessons have italic text.
New Export window allowing different text layouts.