uninstall dvdfab, delete the library/extensions/fabio.kext reinstall dvdfab then retry the repair button - https://forum.dvdfab.cn/forum/software-support-english/dvdfab-for-mac/387369-v23-installed-on-macos-mojave-10-14-16-can-t-read-disc post #7
october262
Thanks. Deleted Fabio.kext, reinstalled. It still showed 'upgrade' in the installer, tried that, same thing.
There's obviously something about access it needs that doesn't work in 10.14 even if it worked before with this upgrade.
So I deleted it again, searched for all files, deleted everything, still showing 'upgrade' clicked Standard Install.
This time I got the 'Authorize' box on startup, so that was encouraging, though once again it thought the computer was different from the previous install. Sigh. Unauthorised all my machines, started up...
Thought it would work, but no. Once again it brought up the 'repair button', which then failed.
Same loop, opens up system preferences, security, but I think it's looking for 10.15's "Files and Folders" which isn't in 10.14.
Still can't use DVDFAB.