For the record, last Friday to Tuesday were MTU holidays. Thus, no response. Of course we're now digging out from support issues over that period.
We acknowledge there is a bug in 4.002. We haven't identified it yet, but "suspect" the new code we are using that allows us to process ZIP files using MAX compression. We never did MAX ZIPs before, including MS 4.001 and all of Hoster. Only Microstudio 4.002 and Songverter 1.000 have this new code.
It appears that temp filenames are getting confused, and contrary to our belief, are not getting cleared when we OPEN MS/SV again for processing ZIPs. We will make sure that we clear the buffer on RUN, as temp files are left if a program crashes.
We're on this right now and hope to have at least a target today, if not a fix. I'll post back here later on what we find.