Originally Posted by: jonas_sthlm 
I mean the new mDT3 version 3.4.0
maerklin.de but its gone today


its still on the server:https://www.maerklin.de/fileadmin/media/service/decoder-updates/mDecoderTool3-v340-Setup.zip
CHANGELOG
Version 3.4.0 - 23.10.2019
- Feature: Create your own sounds, select your own sounds (wav, mp3) step by step, process them
automatically and sort them into the sound library (your own library)
- Feature: Decoder projects for all, for both retrofit and serial decoders, new display in mDecoderTool3
and storage structure on the Märklin server
- Feature: The mDecoderTool3 supports mLD track H0 for all-current/field-coil motor (60906)
- Improvement: Decoder with the Decoder-Programmer (60971) read out improved, communication
between mDecoderTool3 and the serial interface in Windows improved
- Improvement: Decoder (mLD/mSD, mLD3/mSD3) programmed and tested via central CS2 from v4.2.9
on revised, improved and optimized
- Improvement: Decoder (mLD/mSD, mLD3/mSD3) programming and testing via central CS3 from v1.4.1
on revised, improved and optimized
- Improvement: New firmware is loaded from the Märklin server without having to create or open a project
- Improvement: Tooltips added to the dashboard functions
- Improvement: Added more missing status and tooltips in start, dash and detail boards
- Improvement: When a project is loaded, it is always switched to the dashboard, whether from the start
board or the detail board.
- Improvement: In the help menu, the manual of the mDecoderTool3 can be called up
- Improvement: Some CV names and texts in mDecoderTool3 and the decoder templates revised, unified
and provided with units and factors
- Improvement: The program directory has been restructured and cleaned up, texts and instructions as
well as languages and templates, etc.
- Improvement: In the mapping the fields of the actions are dynamically adapted to the window size,
helpful for long sound paths
- Improvement: For a better overview only the valid libraries and sound groups are displayed in the sound
library
- Improvement: The dialog windows can be moved freely with the mouse
- Improvement: The description files of a decoder project were updated (article numbers) and extended to
all functions and sounds.
- Bugfix: When converting the data structure (fds) to v3, the sound CVs brake threshold and brake
bandwidth are swapped, but the CV values were not swapped
- Bugfix: The Sound CVs Brake Threshold, Brake Bandwidth and Brake Deceleration Correction were not
saved after being read into an open project
- Bugfix: The sound CVs of the individual volume levels were displayed correctly but not saved correctly
after changing them
- Bugfix: In the sound selection the sound paths, to distinguish the libraries 'own library' and 'm library',
were not displayed correctly
- Bugfix: When installing version 3.3.0 the old and new decoder templates were not de- and installed
correctly
- Bugfix: In the 'Configure function keys' dialog, newly configured function keys were lost with the check
mark 'Show only active elements'
- Bugfix: If a decoder was programmed, the CVs of the project could be changed in the detail board,
despite the progress bar running, quasi 'behind it
- Bugfix: If a decoder was programmed, the buttons in the dashboard could be pressed 'behind' the
running progress bar
- Bugfix: If a decoder was programmed with a changed but not yet saved project, it was still programmed
with the old CV values after the hint dialog
- Bugfix: In the mapping was the on and off delay of the physics. Outputs (mLD3/mSD3) reversed
- Bugfix: Although no project was selected yet, it was possible to save it in the startboard with 'save' or
'save as