Also: read up on the limitations of the PVP7 Standard, as opposed to PVP7 Performance.
A PVP7 Standard can only talk to one PLC, and has limits to the number of displays and alarms. If your PVP6 is currently talking to more than one PLC, or if the .mer contains more displays/alarms than the Standard allows, then your .mer will not run on a PVP7 Standard.
If none of those apply, or if you're using a PVP7 Performance model, then as Ken said:
....probably.