Here is 0.13-rc5 in debug mode. The shortcut will launch merkaartor under GDB (included) and generate a full backtrace upon segfault.
In case of crash, please send the "gdb.txt" in your merkaartor directory to cbro(at)semperpax(dot)com.
Thanks
merkaartor-0.13-rc5-debug.msi (74968kB).