In case anyone is running into crashes with their saves (last I played was 0.8a), I think I may have figured out what is going on. There are some python variables that were not in the previous version that are causing crashes when you go to the task screen for Mia or to the school.
I was able to enable debug console (using instructions I found here on f95) by modify 'renpy\common\00console.rpy' and changing "config.console = False" to "config.console = True" using a text editor.
I then loaded my save and entered the debug console (SHIFT+O), then typed the following lines:
vika = 0
vikarat = 0
vikaperv = 0
elsa = 0
elsarat = 0
elsaperv = 0
elsamia = 0
miastup = 0
dad = 0
None of these variables were defined in the past (they get set when you first run a new game).
Hope this helps someone else.