My apologies. I see now that file.lastModifiedDate is actually a Date object. I thought it was an integer timestamp which is why I proposed comparing it to a number like this.  We've both tested this and we know it works so I'm fine leaving it like this.

Or, if you'd prefer, change line 941 above to this:

```
var yesterday = new Date(Date.now() - 24 * 60 * 60 * 1000);
```