When you imported contacts did you enable auto-enter options? There's a check box for that in the last dialog to pop up just before the import starts up. If you do not enable this option, your imported contacts do not get the needed serial number during import and this will keep many starter solutions from functioning correctly.
See this thread for more: Help importing Excel data into a Filemaker Starter solution
The thread describes a different starter solution, but the issue and how to fix it is the same.
D'oh! Thanks--I didn't think of that.
Out of idle curiosity, even though City-related contacts now appear, I happened to notice that there isn't a 'Similar_City' table occurrence as there is for Company (Similar_Company); is there a reason why?
I don't work for FileMaker so can only speculate that the people that produced that solution did not build in that capability in order to keep the solution reasonably simple for use by beginning FileMaker users.
On the other hand, the starter solutions are completely unlocked so that you can make any modifications to them you might choose to make.