I have been successful at installing XyGrib 1.2 on a tower running Windows 10 system using the "Online Installer", with the high resolution maps, and have been able to copy paste a large POI file (275 kb) into the C://Users/User/AppData/Local/opengribs/XyGrib folder. So that system works fine.
However, although I have been able to Install XyGrib 1.2 onto a laptop running Windows 7 system, I have not after many attempts been able to successfully find the same folder structure and copy paste the POI file into that XyGrib folder. Any advice appreciated.