Hm, afraid that's due to the package rename from vgg back to ocn, sorry.
However, if you choose "Skip to" in the main menu, you can start a new game with all events that were added before 0.5 cleared.
So it'll be as if you had cleared all events from 0.4 and older, effectively like continuing from a fully completed 0.4.x save.
There won't be any more renames like this, so this won't happen again.
Sorry for the inconvenience.