The following is strictly from myself and my own findings and thoughts. The conception that DX4WIN installs MMTTY is not quite correct - as here are the exact words from their own website LINK :
//quote// For the record MMTTY is not included in the DX4WIN install software because the AUTHOR of MMTTY JE3HHT doesn't allow this. See his WebPages "Commercial Programs are not allowed to include this file", But can be downloaded and used FREE by any HAMRADIO station. //unquote// As can be read/seen above, NO Commercial program can install the MMTTY "engine" as part of it's own install/program.. What is made available is the "interface" -- which, once the installation of the logging program is accomplished - then the user has to go to the MMTTY website itself and download and install the MMTTY "engine". The "interface" that CAN be used with DXbase is already available FREE!! Of course, as is the MMTTY "engine" s/w .. I have been using HamScope as the interface to be able to LOG my RTTY QSOs directly into DXbase - for quite a long time. I simply have a directory on my C: drive that is called Hamscope -- and in that directory is the Hamscope program and the MMTTY engine ... Then when I work an RTTY QSO, I can LOG that QSO's info "directly" into DXbase ... There really is no reason to re-invent the wheel. 73 Joe wa6axe

