I just updated and the project that was working perfectly fine yesterday is not functioning. The window just says the file is “corrupted” (and this happens when I try it using the old version as well). Please, please tell me there is a way to fix this. My last back up was two weeks ago because my external drive is on the fritz, so I’ll lose a lot of work if I have to go through my back up files.
When Scrivener updated the project, it should have created a backup project in the same directory. So, please look in the same folder in the Finder for the backup. What exactly is the error? Could you send us the project to look at?
All the best,
Keith
I’m not the OP, but we’re having the exact same problem. When opening an old file, Scriv 3 says it has to convert it (and backs up the old file properly), but when it tries to open the converted project, I get a long error that says it might be corrupt, and to check the package to see if there’s a .scriv file in it (which there isn’t). This happens every time.
We’re moving from Scrivener 1 to 3, if that’s a factor, and the MacOS is fully up to date. Since L&L support’s closed for the next week+, this is making a holiday gift into something of a holiday curse, since the new upgrade’s unusable.
If that’s the case I suspect that may be where your problem lies - Scriv 3 may not be reading a V1 project properly.
I can’t remember whether the file format changed between V1 and V2 but have you tried opening your V1 project with Scriv 2 ? It’s not really clear from your earlier post.
If you haven’t done that, then download V2 from the website and open your V1 project with that, having made a copy first. If there is any conversion to be done you should end up with a project in V2 format which Scriv 3 can then ‘see’ and convert.
Make sure everything is backed up before you try this just in case, but provided you do that I wouldn’t think any damage will result. Use at your own risk etc… 
Yes, I second this advice. Scrivener 3 doesn’t seem to be able to make the double jump from the Scrivener 1 format. (Actually more than a double jump, since there were several format changes during Scrivener 2’s tenure.)
Download Scrivener 2, convert to Scrivener 2 format, then use Scrivener 3 to convert the result.
Katherine