Sounds like you're trouble is with v.83 of TGO. In your shoes I would try the following steps:
(1)
To check to see if your save file is corrupt and causing your problem: Move everything in the folder where your saves are stored somewhere else temporarily (so you can put them back later if you want to), download and extract everything in the zip file below into your empty save folder, restart your game and replay using the 81% save included to check to see if the game plays properly. (All of these saves work.) If it does your original save is corrupt and can't be used in future unless you edited it, made a mistake, and can reedit and correct it.
(2)
To check to see if the last update spoiled your game: Update the game again from a different source, replacing all of the relevant files and see if that cures it. If it does, problem solved.
(3)
The final nuclear option would be to download the whole game again which is a pain.
Good luck.