Please save my currupted multi savegame

After a crash, I got the message

"Due to the extent of changes required to implement vehicles, saves from earlier versions are non-compatible.

To continue this game:access the pre-vehicles Build 38.30 via the steam betas tab.

SavedGameWorldVersion: 1 CurrentWorldVersion: 195"

already tried the mat_meta.bin copypaste from a new multi game with mod (there's no map_ver.bin in multiplayer): doesn't work.... the only fix is to copypaste map_t.bin but this RESET everything in my base and around my base... :(((

any other solution?? plase :(