The set-up I have is as follows:

I am using the latest version of the app and have performance issues in a number of areas. 

A particularly frustrating issue is my inability to get the 'Connection Preferences' feature to work.  On any device if I try to switch out of auto connection I get the error message "Failed to save the information. Please try again later."

Can anyone advise how to correct this particular problem?

Thanks

Jon