The probable cause is that the version of FieldPoint you are using was released prior to the FP-AIO-610 having been released. The simple solution is to go into MAX, select the IP address of your FP-1601 and choose Find Devices. By querying the devices, the FieldPoint software will identify the FP-AIO-610 as a module that it does not have a datasheet installed for, and will download the datasheet from the module.
Regards,
Aaron