Hoster 3.314 has totally new code that identifies and interfaces to CD/DVD drives. It no longer uses any kind of "drive list" file as Microstudio 3.004 still does. I'd say 100% certainty that is the reason.
We are working on Microstudio 4.0 now, to come out this year (no commitment yet). It will have the same new CD/DVD Drive interface code now in Hoster 3.314.
BTW: Our new code only works with newer drives (back 3 years or thereabouts) that support Microsoft's MMC Interfacing, versus the older ASPI driver interfacing. Thus, some older drives won't work with our newer code that will work with our prior versions. So far, there have been few drives reported that didn't work with the new, and more drives that now DO work.
