Since posting, I managed to find the file and delete it. I was looking at the Library folder under my user name and not the Library folder under the root Macintosh directory.
However, although it worked when I restarted my DAW (Logic pro X) and I was able to see the presets again, it was only temporary (ie.a few seconds) and then the presets disappeared once more.
So, I decided to delete every Arturia file on my Mac and restart the computer.
I downloaded the V Synth as a .pkg file direct from the Arturia website and not via the Arturia Software Centre (which had it’s own set of issues such as incomplete and failed downloads) and it’s now all working fine.
Moral of my experience:
- Like you, removing the db.db3 file solves the empty presets folder issue - just locating it for me was a bit of a pain
- I have found the Arturia Software Centre to create more issues than solve, hence have decided to download all my Arturia software as .pkg files direct from the website
Hope this helps anyone else.
Richard