I know it's almost completely useless information, but the Ovale version of the eVic has it's own MVR software and firmware. I own the Joyetech version. I was able to upgrade the firmware using either MVR software version, and either firmware version. The only change it made was the boot logo. At least we know the logo is in the firmware file, and not hard coded to the device. I know it's just eye candy, but I think it would be nice to make my own logo somewhere down the road.
It looks like after MVR 1.2's release, the firmware will be packed with the MVR software in a single exe. Hopefully this won't complicate things too much.