I moved this to Hoster Help Forum as it really is about Hoster.
Hoster 3.314 has totally new CD/DVD Drive interface code we just finished so there is a significant change from 3.313.
We didn't try importing a Pro-Burn disc during the 3.314 development, but we're glad to hear Pro-Burn can now be imported in spite of our not doing anything.
It never ceases to amaze me what can happen in software developments!
