TSGal from Filemaker (Tech Support) will help you convert your files. See the following link, then click on TSGAL user name to send her a message. She will let you know where to send your file(s). Re: Bento 4 to Filemaker Pro Migration Tool Unexpectedly Quits
Note : That it will most likely be Monday before you can a response from TSGAL.
Thank you for your post.
There are some definite issues with the Bento to FileMaker Migration Tool when run under Mac OS X 10.10 and 10.11. If you do not have access to a Mac running Mac OS X 10.9 or earlier, then I will gladly migrate your Bento database for you. I have sent you a private message with instructions where to send the file.