I just tried uninstalling/re-installing again, after manually cleaning off all folders and files created by the installation, and a manual registry clean of all
DVDFab related keys.
The new install still says it's Version 4.0.0.0. Interestingly, when I installed over the old 4.0.8.0 Beta, the version number stayed the same after intalling 4.1.2.0 over it.
So, if installing over an older version the version number in the "About" box stays the same as the previous version you had, and if you do a clean install, it will say 4.0.0.0.
The update.ini file does say 4.1.2.0.
I have had this happen with at least one older 4x version, but Beta 4.0.8.0 had the right version number in the "About" box.