Appointments+ error message on subfolder Appointment

I upgraded the plugin from two days ago....then I saw this error, after I click on "Add New" in the appt subfolder. So, I de-activated plugin and re-installed it. Same error message:

[Appointments+] You have at least one javascript error on http://facialsandwax.com/wp-admin/admin.php?page=appointments.
Error message: TypeError: $(\".datepicker\").datepicker is not a function
File: http://facialsandwax.com/wp-admin/admin.php?page=appointments
Line: 257