v0.55.1

Added

• Start over on the migration wizard's Run and Release steps: give a
  started migration up. The copy stops, the catalog shows your originals
  where they were again and the Lunelis folder setting goes back, so the
  target can be emptied and the migration planned again. Nothing is deleted
  or moved; the catalog is backed up first. Refused once originals have
  been moved aside.

Fixed

• Photos copied to a NAS came out hidden. A migrated or imported
  Library looked empty in Explorer although every file was there: each copy
  is written under a temporary name that starts with a dot, the NAS marks
  dot-files hidden, and the mark stayed after the rename. Copies are no
  longer left hidden, and the migration wizard's Release step clears the
  mark on what an earlier version copied. A file that was hidden at its
  source stays hidden.