I'm running QGIS 3.4.2 on Windows 7 64bit. I need to import periodically a specific table from several different MS-Access 2010 mdb's. The database and path changes quite often, so an odbc solution is not the right solution for me. I tried the solution "Opening Esri Personal Geodatabase (*.mdb) using QGIS?", downloaded and installed the 64 bit ODBC driver with command line ( / passive),changed the qgis.bat file and added variable names in QGIS settings. When I try to drag and drop an mdb-file onto the layer window, I am still getting the message "invalid data source".