Mark,
I would suggest that you have more than one instance of Radarbox on your computer and the wrong older Navdata is being used, G-SJMC isn't in the database and neither is Mytravel so looks like you are looking at the original database from one of the instances on your computer through another newer instance.
My suggestion would be to delete all versions of RB from your computer and start again by installing V5.00.65 then upgrading to V5.00.71. If you do this save your mylog, photo folder, logos, silhouettes etc that you want to keep and reuse them in the new version.
Alan