Lyle, There is no way to change the directory that the program uses to read data out of. However, you could use one of these two options:
1. When making backups, you could backup to a network drive so that the backup could be restored on any other machine that is on the network.
2. You could install the program on one machine (that is accessible by any computer on the network). You could then actually run the program (along with the data) from any machine on the network. The only drawback to this will be that the program will run slower.