The cause if this is most likely the same as the other memory problems.
We are still changing some things with memory managment.
DVD2one does use memory more intensive then most other applications and somehow the memorymanager of windows has some issues with that.
(for example the MAC uses the same methods and never have any of these weird problems)
By the current looks, we have to make some work arounds for a the various windows versions, but this is going to cost us some time. (install windows version, test'n'debug, fix, re-test etc. etc.)
But we are taking this problem serious, but please do not expect we fix this within 5 seconds orso