Does DfuSe_Demo_V3.0.6_Setup.exe have 30-day work limitations? Yes or no?
No, "Demo" may be an historic artifact from the original author.
STM makes the software freely available to encourage use of its STM32 technology.
DMR-CLEAR_MEMORY_DFU.dfu is the only file I need to clear the memory?
Yes, but you need that only if some other firmware does not work after installation.
Shouldn't these other files be used ?:
Most folks do not install firmware for no reason.
DMR-color-tweak-sept.29.2019_DFU.dfu
Do you need to change trace colors?
DMR_FILL Flash with FF DFU.dfu
May be the same as DMR-CLEAR_MEMORY_DFU.dfu
It is for the same purpose, so not both.
DMR_M_10KHz_sept-13-19.dfu
Such as these were for enhancements, in this case 10KHz instead of 50KHz minimum.
I >>guess<< many enhancements are in Gen Hu Oct 2 firmware
DMR_nano-white-trace-test.dfu
Do you want white traces?
Oristo