If the reference database that is currently marked in the Reference Database Library contains a PDF-2 database in the “old” format, you can shift (move) the corresponding PDF-2 database file to a new location:
First, please display the Reference Database Library in Match!, e.g. by running the "Select Reference Database" command from the "Database" menu. Afterwards, please move or copy the corresponding file “pdf2.dat” (or similar) to the new location (e.g. using the Windows Explorer, Finder or some other file manager), then press the "Shift" button in the Reference Database Library, and select the file “pdf2.dat” at the new location. Match! will update the internal reference to this file, so that it knows where to find it when reading data e.g. for displaying them in an entry data sheet.