Last night we pushed the 1.01e update for CLANNAD. Thanks to everyone's feedback and reports throughout December we were able to get the final bugs and corrections sorted.
The 1.01e update also changes variables and scripting from the previous version, and this unfortunately will break the current save data. To help players who are still working through their current playthrough we have frozen the previous version in a separate "safe" branch. To switch to this branch, open the game's Properties from your library, go to the Betas tab, and select "safe - December 6 version". Switch back to NONE when you are ready to return to the 1.01e update.