For me loading and saving works with the patch but the game crashes sometimes wen i save . And it takes ages to save sometimes. And wen i play for a while the game starts extrem to lag .

I fixed my loading issue. After completely uninstalling the game and then using CCleaner to delete any registry entries (just to be safe, not sure if that was necessary) and then doing a completely fresh install, loading works properly. I can even load my old save files after transferring them back. Deleting saves in-game also works. Thanks to the developers for all of their help with this.

^^ Above post worked for me

Uninstalling the game, running CCleaner just in case, and reinstalling the game from the latest version has fixed the issue. I can load save games, i can load old save games, and uninstalling and reinstalling did not cause me to lose any data.