We’ve just released updated Windows installers to remedy save corruption and a related crash.
Simply download and re-run the installer. It’s fine to run over top of the existing install, and you do not need to re-download ndata.
The issue affects all versions of Windows, as long as save compression is enabled (which is the default). You may also want to delete all backup saves, located in
%APPDATA\naev\saves\ with the extension .ns.backup, though this isn’t required.