Hi,
Assuming it is a Windows PC, look in
C:\Users\<your user name>\AppData\Local\openGribs\XyGrib
In this folder there are two files:
xygrib.ini - this has all your preferences and setting for XyGrib
xygib_poi.ini - this has all of your points of interest.
After installing XyGrib on your new PC just copy these files to the same location.
Hope this helped,
David