Thanks Bruce & Dave for the very quick reply
The only files in my Data folder are:- cycle_info.txt, P2ABaseData.mdf, P2ADynamicData.mdf, and the Backup folder is empty.
I have installed Pilot2ATC v2.00 Beta, then Pilot2ATC_Update_20121
How do you update the Navdata, where should it be?
Thanks for your help and suggestions
Tony