Nu hände det igen, en uppdatering tre år senare.
https://streaming.maerklin.de/public-media/mdt3/mDecoderTool3-v365-Setup.zip
Version 3.6.5 - 13.02.2026
Feature:
- The mDecoderTool3 supports the new mSD3.5 and mLD3.5 decoders in H0/1/G gauge
- The mDecoderTool3 supports mLD3 track H0 revision F, mSD3 track 1/G revision G
- The mDecoderTool3 supports the mSD3 track H0 with PluX22 interface with RailCom as a serial decoder with Spielewelt
- The new special function "Derailleur flash" is available in mapping, for which the physical outputs and the SUSI functions F# can be selected and set
- Session-based logging has been introduced for application support. This log, which records events and messages during operation, can be used for remote diagnosis (directory: mDecoderTool3_Logging, path: environment variables TEMP or TMP)
Modified:
- The decoder information in the "Information about Decoder" dialog has been grouped according to decoder hardware and decoder firmware
Improvement:
- The selection of a central station as a programming path has been revised, improved, and optimized to include all stations when multiple networks are set up on one computer and when switching between central stations if there are several to choose from
- In the format settings, mfx and mfx+ can now also be switched on/off
- The decoder information about whether RailCom is supported is only displayed if, in addition to the decoder hardware, the decoder firmware also supports RailCom
- Revised, standardized, and renamed some CV designations, texts, terms, and expressions in mDecoderTool3 and the decoder templates
- The mDecoderTool3 includes the latest FTDI CDM driver 2.12.36.20 for the decoder programmer, which is installed during installation
- The mDecoderTool3 includes the latest MSVC2010 SP1 Redistributable Package. If it is not already installed, it will start the installation if necessary
Bugfix:
- Changes in the decoder project could be lost if the project file mdtp was blocked and could not be written when saving
- When converting projects, the 'old' CV values but the 'new' block IDs must be transferred in the data structure (fds)
- With the flag "Open the last project when starting" in the program settings, the last opened project was only opened when clicking on the start board button "Open an existing project" instead of when the program started, as expected
- When deleting an action in mapping, everything must be removed in the background, i.e. action condition and trigger. Fragments could remain, which reduced the number of free mappings even though the action was deleted
- When resetting a function in mapping, the action may only be removed as a trigger if the action is not still triggered by another trigger
- As long as mDecoderTool3 itself is not correctly scalable (size of text, app, elements), prevent the scaling of texts
Något man fortfarande inte har fixat är att applikationen kraschar om man stänger CS3 först. Sedan om man väljer en motortyp och där efter läser ur dekodern i CS3 så har den en annan typ av motor 
Mer info:
maerklin.de
