Error message ....unrecognized database format....

 

Make sure to download and install ERPlite with the correct version of Microsoft Access.  If you have both, 97 and 2000 versions of Access, ERPlite will setup in the version of Access that you most recently ran.   For instance, if you were previously using the 97 version and then you download ERPlite for 2000, setup will run the 97 version and you will encounter the following error message: