NCH Software offers a no-nonsense 30-day money back policy. If you are unhappy with your software for any reason within 30 days from purchase.
Let's try doing a clean install and delete all the cache of the program. Uninstall your software first, then go to the folder location below on your computer then delete the ExpressBurn folders:
C:\ProgramData\NCH Software
C:\Users\(Your computer profile)\AppData\Roaming\NCH Software\ExpressBurn
If you can't find the AppData folder, set Windows to show hidden files and folders with the steps from this link: https://support.microsoft.com/en-us/help/14201/windows-show-hidden-files.
After deleting the ExpressBurn folder, restart your computer then install it again from the next link https://www.nch.com.au/burn/index.html
That should do it. Please try it again after that and see if that fixes the issue.