If you have lost your username or license code, do not use "crack" sites, which often contain malware. Instead, use the official recovery channels:
like "Registration info is invalid," or does the software simply revert to trial mode after you restart it? Xilisoft Video Converter Ultimate FAQ If you have lost your username or license
Ensure you are using the code for the correct version; codes for older versions (e.g., version 6) will not work for version 7.8.26. Method 2: The Registry Reset Fix (Recommended) do not use "crack" sites