After having transferred the save to another computer (still Windows), I have a crashlog:
0> Dwarf_Fortress!std::_Init_locks::operator=+0x7F2B96
1> Dwarf_Fortress!std::_Init_locks::operator=+0x7F2D09
2> KERNELBASE!UnhandledExceptionFilter+0x1E7
3> ntdll!memset+0x13B0
4> ntdll!_C_specific_handler+0x96
5> ntdll!_chkstk+0x11F
6> ntdll!RtlRaiseException+0x484
7> ntdll!KiUserExceptionDispatcher+0x2E
8> Dwarf_Fortress!std::_Init_locks::operator=+0xD71072
9> Dwarf_Fortress!std::_Init_locks::operator=+0xABD7AA
10> Dwarf_Fortress!std::_Init_locks::operator=+0x5F9ABC
11> overlay_plug+0x7F5E
12> Dwarf_Fortress!std::_Init_locks::operator=+0x8FA0D6
13> Dwarf_Fortress!std::_Init_locks::operator=+0x626504
14> Dwarf_Fortress!std::_Init_locks::operator=+0x6278B9
15> SDL2!SDL_DYNAPI_entry+0x799D7
16> SDL2!SDL_DYNAPI_entry+0x12EEDE
17> ucrtbase!configthreadlocale+0x92
18> KERNEL32!BaseThreadInitThunk+0x14
19> ntdll!RtlUserThreadStart+0x21