Sorry - I am using vs 2.91 (this does not solve my problem.) I have just read earlier thread which suggests that you are rewriting the offending files for a new upgrade.

Everytime I install NL2000 (v2.9) and then use the Feature Panel to upgrade the configuration it disturbs the Aircraft Listings in the FS9 Settings panel. When one tries to select an airport in FS9, one cannot select any "country" listing after "The Netherlands". There appears to...