I think I've done something really stupid to my FS9 installation

Due to a Windows XP crash I have reinstalled everything recently along with a fresh installation of FS9. So far so good and all was running well. I then added some of my extras to FS9, like Scotflight, UK North landclass, the BAC111s, 748s, Dreamfleet Piper Dakota, etc. Still no problems and everything running perfectly. Until today! Enthused by the fresh FS9 working so well I added a load more aircraft, scenery and other stuff (fonts, FSUIPC, and so on). Happy as Larry (whoever he is) I fired up the sim only to find that most panels that have digital data - like the Cessna radios - have no digits any more

When I shut the sim I get an error from the RXPSRV.DLL, which is part of the Dreamfleet stuff. Doesn't help if I remove that module - no crash but still no digits. I've buggered up something but I haven't a clue what. Any ideas chaps or is it uninstall FS9 and then reinstall?
Andy