Some clarification is needed. FileMaker Pro and FileMaker Advanced are the client software. There is also FM Server and FM Server Advanced.
The developer license version of FM Server is for FM Server Advanced.
There is no trial version for the client FileMaker Advanced, only for FileMaker Pro.
(The only distribution of FM Advanced (client, not server) without payment was for those registered for pre-release software, and those installations expired shortly after the public release.)