Initial error caused by1efc94bb2fand fixed in6a7917162c. However the empty index files (empty as in, they contain the version number but no assets) will have to be fixed somehow, since otherwise assets don't show up at all for people who saved asset files in a broken version. Delete empty index files if the modification timestamp indicates a time when the bug was present (plus a day before and after, to address possible time zone differences). This will basically make Blender skip the optimization for .blend files without assets for one load, but even then the index should still produce faster results than a completely non-index read. This can be removed after a while, it's just a (much needed) fix for people who were using alpha/beta builds. Differential Revision: https://developer.blender.org/D16678 Reviewed by: Jeroen Bakker