multiSnow

Let me answer your last issue at first: mcomix3 does not support win32 since it is using pygi/gtk3 (see the Note of https://wiki.python.org/moin/PyGtk), so you may want keep mcomix running with py2 and pygtk. for some others: - I'm not sure but https://github.com/multiSnow/mcomix3/commit/9c641061904d4c07759a803794dec3c7b1209592 maybe fix the KeyError in double page mode. - right to previous and left to next in manga mode, reversed in non-manga mode. maybe I should mention this feature in README....

PIL.Image.VERSION is not the only incompatibility in Pillow 6.x. The behavior of _getexif is alse changed and broken in png file with exif data. See https://github.com/multiSnow/mcomix3/issues/76 for more infomation.

It is not a fork of gtk3. mcomix already has a gtk3 branch. What I did is no more than porting it to python3, and python2 compatibility is totally droped.

The _BaseFileChooserDialog.collect_files_from_subdir use mimetypes to collect files, but the .cbr is not a registed in IANA and not included in mimetype, so this bug occurred. One way to fix this bug is adding this mimetype (together with other types if needed) to mimetypes using mimetypes.read_mime_types or mimetypes.add_type. Another way is, avoid using mimetypes but using os.walk to dive into subdir.