If you want to use Filemaker to design an application for someone else to use, let's say a friends company. From time to time, they may want updates or increased functionality. I don't really want to VPN or Remote Desktop into their network and work on the live database, I would rather keep a copy and work on it on my own PC. The question that I have is how do you do this when presumably you have to send them a new file once done with the upgrades, but my upgraded file won't have any of their data. So how do they install an upgrade when my file is not synched with their file in terms of the data?