Hi There,
I’m guessing you’re probably putting in a license key for CabWriter 5 which won’t work with version 6. You just need to go through the upgrade process to get a new set of version 6 license keys. This is free assuming you’re up to date on your support membership. You can do the upgrade here:
Just click on Upgrade to CabWriter 6 in the upper right corner.
Let me know if you have any questions.
Thanks,
Greg