ronald ortiz - I just figured it out too and should have looked closer here !
I am going to list every step needed to fix the freeze issue.
Go to the midi commander downloads page at https://meloaudio.com/pages/manual
Download the zip file under the name
Windows DFU program.
The zip file is called en.stsw-stm32080.zip
Extract the downloaded zip file , and run the installer which is called DfuSe_Demo_V3.0.6_Setup.exe.
This file is the actual installer file, even though it has
demo in the name.
This creates a folder here : C:\Program Files (x86)\STMicroelectronics\Software\DfuSe v3.0.6
The part that confused me is that the installer is really not finished at this point.
You still have to manually drill in to this subfolder bin/driver to install your drivers, this is the step that really threw me, it might be mentioned somewhere but I never saw it .
In the subfolder bin/driver are folders for Win7,Win8,Win8.1 and Win10
In my case I need Win10, and in here are two files: dpinst_amd64.exe and dpinst_x86.exe
In my case I need the amd64 version - even though I have an intel machine, the names are really to separate 32 bit and 64 bit versions ( another gotcha, I would normally expect to ignore any file with amd in the name )
Now when you run that file, dpinst_amd64.exe, it finally installs the drivers.
Now you can go back to the midi-commander install page and download
This will download a file called DFU_Package_190813.zip
Unpack and you get a folder right there ( in my case C:Downloads\DFU_Package_190813\MidiCommander_DFU_APP )
This has the app DfuSeDEmo.exe.
If your hardware is now set up as shown ( hold down
Set and power on ) then you can run this, you can follow the pdf user guide now, and navigate up one folder to load the file TSMIDI_DFU_V3_STD2.dfu
Finally it should upload to the hardware, and in my case it does indeed fix the USB freezing issue.