Having made absolutely no changes to it, FS9 now refuses to run. It refers me to the FSUIPC Log, in which one of the modules is not accepted by an unregistered version of FSUIPC. But, since now't has changed, how can this be? I've done the usual trick of removing FS9.cfg but it makes no difference. Looks as though I'll have to remove and reinstall FS9.