Hmmm....

just as an experiment, I cut and moved my
RichSavedGame files to another location on my PC, without moving the folder, yet my saved games worked with no problems. I then loaded my last saved game and immediately saved it again; sure enough, a new file was generated in the RSG folder. Clearly, the missing RSG files are not the problem...
It's far more likely merc4ulfate is dead right: deactivating the mods in JSGME has upset the horse, which then tipped over the apple cart, whilst throwing a monkey wrench in the works and screwing things up. Try resetting all your JSGME mods back to the way they were...