The people feature is not working on my Fingbox anymore

Prior to the completely revamped UI version of the Fing app on iOS, I was having a problem whenever I tried to add a new user, it would let me go thru the whole process of creating the user and adding devices, but would fail with an error, “Could not update from Fingbox”.  I could still see the users I had previously added, and it wasn’t a big enough deal at the time to worry about.  Now, with the current version of the app, I don’t see any of the people I had added in the past and if I attempt to add someone with the same name as an existing user it wont even let me select a device to add to them, and creating a brand new person allows me to assign devices but still fails at the end with “Could not update from Fingbox” and I have to cancel.

It feels like the database it uses for people (or however it is managing identities) is corrupted.   Any ideas how I can recover or reset this?  I’d prefer not to lose all of the information I’ve entered for all the devices on my network, and ideally I would love to recover the existing people database with device assignments as well.  They are evidently still in there, since during the setup existing people fail differently when I try to add them back vs. a new user. 

Thanks in advance.
West