Unfortunately, this is caused by a problem with Apple's installer/updater.
Would you please take a look at the following forum post to see if it helps?
Sorry for the inconvenience.
Please let us know if this helps!
Your responses were helpful as I was about to uninstall the App and start
again, at which time I would have lost my documents
However, having left the App trying to reload overnight was sufficient as
the fairies obviously came and sorted the problem and all is working as it
It's a great App. But I now need to ensure I back up the documents just in