Yeah, that sucks. My folder only has a LFSLazy.stats file, no sign of statsv2, but maybe that's somewhere else. (I haven't played LFS for about 9 months though, which may mean I'm out of date
The .stats file is binary so might be rather tricky to rescue it with an editor I guess.
Maybe you have "previous versions" available if you right-click on the file, or a backup...