The Wonderland Board

We have got 4 people in our family playing this all with at least 3 saves each. The game freezes and has to be shut down with ctrl, alt, delete.
The wallpaper on the screen dissapears and it says memory access violation.
Do we have too many saves going on and is there any way of deleting saves that are no longer needed.

4 people playing the game once at a time?

daughter plays as her for a while on her character, then husband as his character, me as mine and son as his.
4 usernames and characters and sets of saved games, we are all at different points in the game