FileMaker has been relational for some time now. I believe in version 3 or 4.
Yes you could import the data. Also you possibly can do a few file conversions to get them to the new format.
The manual is free. There is a PDF as well.
Thanks for the information. My older versions 3 and 5.5 aren't relational, and I didn't want to spend another $300 for another new version that wasn't a fully relational database. Thanks again!
Not sure about 3 but 5.5 definitely was.
Starting in FM7 you could have multiple tables in 1 file.
FMP 3 was the first relational version released. For versions 3 through 6, each table had to reside in a separate file, but that doesn't mean the system wasn't relational.