Appointments+ General Settings changing

Installed software:
WordPress 3.6.1
ThemeFusion Avada theme
WPMU DEV:
MarketPress
Appointments+
Snapshot
HTML Email templates

After making changes to appointments+ locations, my appointments+ -> general settings, change spontaneously.

This destroys my config, force payment, time interval = 30, and many other necessary settings.

Please advise how I can stop this.

Thank you.
Zach