* FileMaker can do export of records into CVS format exactly. Valentina can import that
* I do not remember that FileMaker could export schema of tables. May be this was added? Please check.
If they can do SQL dump as can mySQL, postgreSQL, Valentina DB, then you can use that dump to create tables. If they cannot then you will need create tables manually.
* Aha, I remember that about yet 5 years ago, in REALbasic world did exists some FileMaker migrator utility.