I don't think it ever will, I'm afraid. You can use a HEX-USB+CAN because you set it to boot in 'dumb' mode, then use Virtual Com Port drivers and the interface effecively becomes an RS232<>K-Line passthrough. However, all of the K-Line and CAN comms are directly handled inside the HEX-NET - with only propriety comms between the interface and computer. There is also no option to set it into dumb mode.
Keep a hold of your old HEX-USB+CAN. I use one and it works flawlessly with NefMoto and ArgDub's ME7 EEPROM tool.
I was always able to use the HEX-USB-CAN cable in dumb mode (with Nef), but without having to do the virtual com port stuff. Unfortunately I already sent the old cable back for the credit they give you towards the new cable. I have other cables that still work with Nef and arg + many others, but the VCDS cable was better for sure. I will remain hopeful that a solution can be found. My old VCDS cable was not able to comm with the newest cars (namely the clusters) and I would expect it to get worse over time.
