Hi, you can easily go to the folder where the COINDESC.MDB data file is. Select:
File > Toto Data Folder...
from the main menu. To open the COINDESC.MDB data file you would need MICROSOFT ACCESS installed on your computer.
Regarding importing values, there is not a way to do that. Since those values change so frequently it would be easier to just look up a value online when selecting a coin. You can currently go to the PCGS coinfacts page from a coin that has a PCGS number, from there you will see values for that variety. I don't think this was possible with NumisMedia last time I checked.