The last version of S/W for the 3100 was rls 4, several years ago. The product was discontinued from manufacture and replaced by the SX200 CXI
Seriously, if it's dead, I would polish up the old bugle and blow tapps over it & bury it.
I believe there is still available a trade-in/trade-up program for the 3100 as credit toward a new SX200-CXI. Sorry, but that's the best offer I think you're going to get.