[pauldauv]

I just hit on the solution to having too many zip files. I use the iPhone app standalone, i.e. I do not have a Mac.
Here's what I did:
- Hit "Don't Sync" under Settings/Sync Settings
- Close Omnifocus and stop it running
- Open Omnifocus again after a while...
- It will then optimize the database, instead of syncing to the server
- Now there is 1 zip file rather than ~800 and I have enabled syncing again.