First of all I’m sorry but if you download this version you will need to start a new game completely. I tried to avoid this but in the end I couldn’t. So you will have to create a new save and manually edit the files by hand, do not simply copy your full old save files and paste them you will have the same issues I did.
Somethings you will notice and many you won’t from the update, have fun with it and a great weekend.