Ensure you are using a key for version 9.0 . Keys for older versions (like 7.0 or 8.0) will not work with the 9.0 software.
If you don’t have a key or your key no longer works: vidbox vhs to dvd 90 deluxe product key 2021
: Consider making multiple copies of your converted videos and storing them in different locations or on different media types to ensure long-term preservation. Ensure you are using a key for version 9