I have downloaded the TIBCO Business Studio from the TIBCO official website . After Installing the application, when i opened the start menu, there were two options
1.Studio for analysts
2.Studio for designers
I opened the 2nd option i.e. studio for designers,and then i choosed the new->BPM for developers.
A interface was opened , but i found that the palette panel was not having the components like JDBC,JAVA,MAIL,etc.., that are usually found in the TIBCO designer.
I'm replying not just to you but for general knowledge...for what I know so far TIBCO Designer Add-inTM is PAID.
The thing is...what you have downloaded is TIBCO Business Studio TM wich is a community edition -> free .
I think that this add-in costs around 35$ but I'm not completely sure about that. You'll have to get in touch with a sales representative of TIBCOTM and get further info.
I already tried to get a trial version, without sucess , for testing purposes but not even that is available. So...if anyone gets a trial version or a demo please tell me 'cause I'm totally interested.