Thanks so much for the info, It seems it worked, as I only tried one from EGKK/EGCC that was giving CTD before, but this time it accepted it!
I re-installed the Navdata Center and updated the AIRAC Cycle, though the latter is only for FSX and XP11 I think as I don’t see any entries for MSFS, so I’m not sure if that matters. I will try more airports tomorrow as it’s late here, and try to make a flight.
So thank you once again for your help FireCell, much appreciated 
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