its a bit late but i had the same problem the thing i die was to have the sav.dat 3 times one you rename to rsm1.dat the other to rsm2.dat the last one not renamed (still sav.dat) and then you than you import all files (p.s. i didnt use jksv i use savedatafiler but i think jksv should work too) when you didnt found anything yet let me knoe if it work