Cache Directory Error - I think I´ve solved it

Some of you will remember my posts over the last three or so months about FS9 CTDing with supposedly missing files.I have been running a lite FS install on another HD with no problems, slowly adding scenery, but then I got distracted - in the best way possible - by the iFly 737.Then yesterday I reinstalled DBS Studio Airport GPS and my flight crashed. Uninstalled it and completed the flight. Installed it again and crashed. I have removed it again and will restart the flight, but Im pretty sure now.If the program really is the culprit it will be a shame, cos its a very handy little tool although its very clunky in use (have to Alt and pause) and I will get lost at big airports without it.Thanks to those who chipped in with ideas and support.