I am having the same problem and it is getting urgent, as we were hoping to use the charts for sailing south from Ensenada.  The program was working fine and now it asks for my email address and then comes up with validation failed.   I have tried uninstalling and reinstalling the program but it doesn't work.  Also sent the emails as indicated by grib.us ... no response.    If the administrator reads these forum posts and can give an answer, please post the fix.   Thank you,  Pacific Bliss

I rather think that GRIB.US define each different IP address you use to connect as a separate computer. So those of us who move around a lot and connect via a variety of wifi hotspots (and thus appear as a variety of different IP addresses) very quickly use up the few "licences" GRIB.US allows.

This method of identifying individual computers has led to other (less serious) problems. For example, I connect both via wifi hotspots and via a satphone and each time I change connection method (and thus change my IP address) I have to re-enter my email address.

I suspect the guys at GRIB.US have realised that there is a problem with the way they identify users - ie. via IP address - and it's so fundamental to the way the service is structured that they don't know how to fix it. That's why it's gone very quiet lately. For a that is service aimed at sailors (commercial and leisure) not realising that we'd use a variety of different IP addresses (via wifi hotspots for example) is extremely bad planning.

(Not) cheers........Tony C. s/y Little Roundtop