Github user venice1200 has created a 2095 cassette interface emulator descendant that allows for direct upload of programs to the Microtronic (or Phoenix) via an Arduino-based USB connection from the PC (no SD card required). On the PC side, a Python script is used to transfer MIC files directly into a Microtronic / Phoenix running the PGM 1 program loader. An Arduino Nano is used for the USB connection. Check out the project Github for more details about this great project. Thanks for sharing it with the public, Venice1200!

Update: tested it myself this morning - and works as advertised!