fileBee as Java Webstart Programm is signed with a key from thawte.com the Certification Authority.

Older versions of fileBee were self signed  which is not so wide accepted than certificates from official Certification Authorities.

Some words about new,unknown Programs:

In the internet age where lot's of email transport millions of virus infected programs,
help is need to find out if you can trust a program or not.

Java Webstart Program Enviroment is a mechanism which prevent unknown, not signed programs
from doing malicious things with your computer. This a big advantage. Native programs for Linux and Windows are free to do what they want to do from the first second of running...

On the other hand the negative aspect is obvious from the programers view. Real programs which have strong limited computer access have nearly no sense.
OK - what programers can do is: Request a certificate from an certification authority. CA's create certificates for people how are known. Certificates are NOT an anti virus shield. But they help to pick out the black sheep of programers. - If it's know that a program x is bad you can see in the certificate who's made it !