As a patriotic brit I like to download anything related to british space programmes.
If like me you downloaded Notebooks Blue Streak F2 (SC3) add-on, only to find that it CTD's (Crash To Desktop) if you go anywhere near it. I have patched both the bases. (Pity, is a good add-on!)
Something in Notebooks add-on causes the Woomera 6A addon to CTD also.
I've just spent two mornings sorting through both base .cfg files to get it all working again.
Just re-install both add-ons and then this patch over them, following folder hierachy, of course.
(Orbiter doesn't like a lot of multiple blank lines in it's .cfg files, had to delete a lot. And had to hide a perfectly good mesh (In section 10) before it would behave.)
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Hopefully a few less frustrated British Orbiteers will thank me.