[Moon Jackal]

Hi Kodos.
Had the same problem (sort off). Turned on autosave (it did work - I think). A day later turns started getting slow (6 minutes), then saving and loading took minutes instead of seconds. Took a look at savegame folder to find 12.5 thousand of those files you talk about (a total of 92 meg). Deleted everything except the current game which seems to consist of 1 .gam and 2 .txt files and now I am back to fifteen second turn processing and the same for save/load.
Try deleting everything and see if allis back to how it was when you started.