- update to 4.23.6:
* Fixed MIME name detection of ZFO files consiting of a ZIP
archive and which don't contain a data message nor a delivert info.
* Fixed crashes of message detail dialogue when invalid ZFO
content is attempted to be displayed.
* Fixed some memory-related performance issues reported by
Coverity.
* Fixed blocked MEP login loop on newer macOS versions.
* Fixed sending of ZIP archives in normal (non VoDZ) messages
by explicitly setting their MIME type.
* Lowered the limit for maximum attachment count to 50 files.
* Extended the list of allowed attachment file types.
* Showing total number of attached files in the send message
dialogue.
* Fixed restoration of databases without VoDZ content.

* Fixed tag ordering. Tag sorting is now locale-aware.
* Fixed problems with HOTP authorisation on Windows. There have
been problems with the bundled libisds. MinGW does not handle
POSIX extensions of printf formatting strings properly. Patch
* Fixed a non-working PRAGMA statement when asking for a database
* The --version command-line argument now also prints the version
* Automatic background downloads didn't cause the deactivation of
download buttons that could still be triggered. Triggering those
* Adding new account caused the account tree to collapse. This has
* The logging of libisds actions has been restricted on Windows
because there are discrepancies from standard-defined behaviour
* Improved behaviour when message download fails. The error
dialogue is only shown when an explicit message download fails.
* A message in the notification area appears when the download