https://www.tntware.com/tntconnect/help/faq_en/pages/what-and-where-is-my-database.aspxWhat is a TntMPD database? All of the information you store in TntMPD is stored in a database file. A TntMPD database file name ends with the .mpddb extension. Under the "File" menu you can create a "New" database, "Open" an existing database, and "CloseenCommunityServer 2008.5 SP2 (Debug Build: 40407.4157)