How to figure out which DB engine a particular .odb file uses?

How can I figure out if a .odb file (which I created a long time ago, or got from an unknown source etc.) uses the HSQLDB or the Firebird database engine? (Other than by getting my hand on an old, pre-Firebird version of Base and trying to open it.) Is there any properties window which will tell me what DB engine is being used?

Hello,

should be in the status bar: